Story highlights OSCE says rebels' "patience is almost wearing out"

Flight 17 victims' families keep vigil for third day at Netherlands airport, waiting for more coffins

Dutch negotiating to have police, experts at crash site by this weekend

Australia is sending more police to Europe to potentially help secure the crash site

Even as investigators say they need more access to bodies and wreckage from last week's Malaysia Airlines Flight 17 crash in eastern Ukraine, the pro-Russian rebels that control the territory say they're tiring of having any probe there, a spokesman for a monitoring group said Friday.

With the site still not secure eight days after the crash, and victims' remains still lying with debris, nations such as Netherlands are pressing to send their own police and investigators to the scene. Various negotiations are under way.

But rebels controlling the area -- the same rebels that Ukraine and the United States accuse of downing the plane and killing the 298 people aboard -- hinted to an international monitoring group that they've nearly had enough, even with the small amount of investigators they've already let in.

"We were given the indication ... that their patience is almost wearing out," said Michael Bociurkiw, a spokesman for the Organization for Security and Co-operation in Europe, which has had a small team touring the site for days. "They're saying maybe another week and then they don't know what would happen."

That's not likely to please a number of nations that say a proper investigation still hasn't begun, including Netherlands, whose officials say they're negotiating with the Ukrainian government to send 40 Dutch military police to search for more bodies.

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Photos: MH17 victims' bodies transported Photos: MH17 victims' bodies transported MH17 victims' bodies transported – A line of hearses arrives at the Korporaal van Oudheusdenkazerne in Hilversum, Netherlands, on Saturday, July 26, as bodies from the crash of Malaysia Flight 17 are brought to the Netherlands where they will be identified. Flight 17 was shot down over Ukraine, killing all 298 people aboard. Of the people who died, 193 were Dutch citizens. Hide Caption 1 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – Hearses carrying the coffins with the remains of the victims leave Eindhoven airbase on July 26 Hide Caption 2 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – Dutch military personnel carry coffins to a waiting hearse at the Eindhoven airbase on Friday, July 25. Hide Caption 3 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – An Australian military cargo plane, carrying some of the victims of Malaysia Airlines Flight 17, leaves Kharkiv, Ukraine, en route to the Netherlands on Friday, July 25. Hide Caption 4 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – People watch from a bridge in Boxtel, Netherlands, as hearses carry victims to Hilversum, Netherlands, on Thursday, July 24. Hide Caption 5 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – Dutch military personnel carry coffins in Eindhoven, Netherlands, on July 24. Hide Caption 6 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – Flowers are thrown from a bridge Wednesday, July 23, as hearses carry victims to Hilversum. Hide Caption 7 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – Military personnel in Eindhoven carry a coffin July 23 that holds one of the victims. Hide Caption 8 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – Dutch Queen Maxima, center, stands between King Willem-Alexander and Prime Minister Mark Rutte as a minute of silence is observed in Eindhoven on July 23. Hide Caption 9 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – Dutch military personnel carry a coffin to a hearse in Eindhoven on July 23. Hide Caption 10 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – Flags fly at half-staff as hearses pass by in Eindhoven on July 23. Hide Caption 11 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – A transport airplane with the Royal Netherlands Air Force, carrying the bodies of some Flight 17 victims, takes off from Kharkiv on July 23. Hide Caption 12 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – A Ukrainian honor guard loads a coffin onto a cargo plane at Kharkiv's airport on July 23. Hide Caption 13 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – As they wait for victims' bodies to arrive on July 23, members of the media report in front of a military airport in Eindhoven. Hide Caption 14 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – Police officers secure a refrigerated train loaded with bodies as it arrives at a Kharkiv factory on Tuesday, July 22. Hide Caption 15 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – A police officer in Kharkiv walks past a refrigerated container car loaded with bodies on July 22. Hide Caption 16 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – A man covers his face with a rag as authorities inspect bodies in a refrigerated train Monday, July 21. Hide Caption 17 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – An armed pro-Russian rebel stands guard next to a refrigerated train in Torez, Ukraine, on Sunday, July 20. Hide Caption 18 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – Emergency workers carry the body of a victim at the crash site in eastern Ukraine on Saturday, July 19. Hide Caption 19 of 20 Photos: MH17 victims' bodies transported MH17 victims' bodies transported – Workers load bodies of victims onto a truck at the crash site on July 19. Hide Caption 20 of 20

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The rebels "are encouraging us to pass the message up the command chain, if you will, that a group of experts, perhaps 25 or 30, should get here soon to oversee ... movement of the debris," Bociurkiw, who was with the OSCE team in eastern Ukraine, told CNN's Anderson Cooper on Friday

Monitor: Personal effects suddenly appearing at wreck sites

Accusations over who was responsible for bringing down the passenger jet, which was headed from Amsterdam to Malaysia, continue to be traded by the Ukrainian government, pro-Russian rebels and officials in Moscow and Washington.

Flight 17 was downed on July 17 by a suspected surface-to-air missile over eastern Ukraine, where groups of pro-Russian rebels are fighting Ukrainian government forces. The rebels have denied allegations from Ukraine and the West that they brought down the commercial airliner using equipment supplied by Russia.

On Friday, the OSCE team again toured the crash site, returning to a recently discovered section of fuselage from the plane. This time -- unlike Thursday -- victims' passports and other documentation were there, Bociurkiw said.

"We can't draw any conclusions. But for sure, those were not there the last time we were there," he said. "Perhaps someone placed it there. We don't know."

No Ukrainian government or international force has secured the site, raising concerns about tampering or pilfering.

The OSCE team on Friday toured with a few experts from Australia and, for the first time, some forensic experts from Netherlands.

CNN's Phil Black has reported from the area that there appears to be no ongoing effort to find and retrieve victims' bodies. Though many corpses have been recovered already, Bociurkiw said the group still has seen human remains among the debris several times this week.

378 body bags processed so far

As of Friday afternoon, 378 body bags containing remains of Flight 17 victims have been processed in the Ukrainian city of Kharkiv, where discovered remains have been sent, Sergey Bochkovskiy, the head of Ukraine's State Emergency Services, told reporters there.

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Photos: Photos: Reaction to MH17 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – Families of crew members aboard Malaysia Airlines Flight 17 gather for a vigil Tuesday, July 22, in Kuala Lumpur, Malaysia. All 298 people aboard the passenger plane died when it was shot down Thursday, July 17, in a rebel-controlled part of eastern Ukraine. Hide Caption 1 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – A woman cries July 22 during a service near the crash site. Hide Caption 2 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – People in Melbourne gather to mourn the victims during a candlelight vigil at Federation Square on July 22. Hide Caption 3 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – In memory of two Newcastle United fans who died in the crash, two wreaths are placed on seats July 22 at the Forsyth Barr Stadium in Dunedin, New Zealand. The soccer fans were traveling to New Zealand to watch their team play in a preseason tournament. Hide Caption 4 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – A KLM employee reaches out into a sea of flowers July 22 at Schiphol Airport in Amsterdam, Netherlands. Hide Caption 5 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – A flower and stuffed animal sit near the crash site on Monday, July 21. Hide Caption 6 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – A woman in Kuala Lumpur attends a candlelight vigil on July 21. Hide Caption 7 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – Ukrainian President Petro Poroshenko attends a flower-laying ceremony at the Dutch Embassy in Kiev, Ukraine, on July 21. Although the passengers came from all over the world, many of them were Dutch because the flight originated in Amsterdam. Hide Caption 8 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – A woman places a flower during a candlelight vigil in Kuala Lumpur on July 21. Hide Caption 9 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – Mourners in Eynesbury, Australia, attend a memorial service Sunday, July 20, for a family of five killed in the disaster. Hide Caption 10 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – Buddhist monks in the Malaysian capital light candles during a special prayer for the victims on July 20. Hide Caption 11 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – Wildflowers lie on an engine from the crashed jet on Saturday, July 19. Hide Caption 12 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – Friends of Nur Shazana Mohamed, a crew member aboard the flight, take part in a special remembrance prayer at a mosque in Putrajaya, Malaysia, on July 19. Hide Caption 13 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – Dutch Prime Minister Mark Rutte signs a condolence register at the Ministry of Safety and Justice in The Hague, Netherlands, on Friday, July 18. "I want to see results in the form of unimpeded access and rapid recovery," Rutte said in a press briefing. "This is now priority number one." Hide Caption 14 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – People pray for the victims of Malaysia Airlines Flight 17 at a church outside Kuala Lumpur on July 18. Hide Caption 15 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – A woman in Berlin places a candle at a memorial on July 18. Hide Caption 16 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – People in Kiev gather to mourn the victims on July 18. Hide Caption 17 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – Akmar Binti Mohd Noor, whose sister was aboard Flight 17, cries outside the family holding area at Kuala Lumpur International Airport on July 18. Hide Caption 18 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – A man prays at a memorial in front of the Dutch Embassy in Kiev on July 18. Hide Caption 19 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – Dutch cyclists wear a black armband in honor of the crash victims during the 13th stage of the Tour de France on July 18. Hide Caption 20 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – Dutch Justice Minister Ivo Opstelten observes a moment of silence after signing a condolence book in The Hague on July 18. Hide Caption 21 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – Candlelight prayers honor the victims at a church outside Kuala Lumpur on July 18. Hide Caption 22 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – Floral tributes adorn the entrance to Schiphol Airport in Amsterdam. Hide Caption 23 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – A Dutch flag flies at half-staff in The Hague on July 18. Hide Caption 24 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – People place flowers in front of the Dutch Embassy in Moscow on July 18. Hide Caption 25 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – Students attend a prayer July 18 in Central Java, Indonesia. Their teacher John Paulissen was a passenger on Flight 17. Hide Caption 26 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – Russian President Vladimir Putin, center, and members of his government observe a moment of silence on Thursday, July 17. Hide Caption 27 of 28 Photos: Photos: Reaction to MH17 World reacts to MH17 crash – People pay tribute to the victims outside the Dutch Embassy in Kiev on July 17. Hide Caption 28 of 28

Officials say it's unclear how many individual victims' remains are contained in the bags.

Dutch citizens comprised 193 of the 298 people aboard the downed flight. By Friday, 198 coffins had either already arrived in Netherlands or were on their way Friday, Bochkovskiy said.

Another 38 coffins were expected to arrive in Netherlands on Saturday, he said.

Officials accused the rebels who control the crash area of preventing recovery workers Thursday from searching for more bodies.

On Friday, Jan Tuinder, head of the Dutch police team that his country wants to send to Ukraine, said he hoped better access could be negotiated between the rebels and the Ukrainian government.

"I just want to get in," Tuinder said.

Netherlands is stepping up efforts to ensure that the remains of all the crash victims return home from Ukraine, Dutch Prime Minister Mark Rutte told CNN on Thursday.

"We will increase our effort to bring home all the victims of this disaster," he told CNN's Cooper. "We will send into the crash site a large number of people from the Netherlands -- experts, forensic experts, people from the police who are trained to deal with this type of work."

He said he hoped to have about 50 personnel at the site by Sunday.

Dutch families keep airport vigil

At Netherlands' Eindhoven airport Friday, Silene Fredriksz and other victims' relatives held vigil for a third day, watching the coffins come in but not knowing whether they contained their loved ones.

"When they're here on the Dutch grounds, I (will) feel safe," Fredriksz told CNN's "New Day" on Friday. "After all the horrible things I've seen that happened there in the Ukraine fields, it's a big, big nightmare for us, but ... when everybody's here, I feel safe."

Fredriksz's son, Bryce, was on the flight with his girlfriend, Daisy Oehlers, bound for a Bali vacation. Fredriksz said she'll be at the airport, watching the military cargo planes come in and the coffins come out, until they stop coming. As the coffins have been brought off, they have been received in solemn ceremonies.

"It's very emotional, but also beautiful that they're finally home," she said.

The bodies' arrival in Netherlands contrasts starkly with their initial treatment at the crash site, where they were left exposed to the elements for days, and in some cases, according to Dutch officials, stripped of personal belongings.

The transfer of the remains to Netherlands that were brought to Kharkiv, Ukraine, is expected to be completed by Saturday, Rutte said Thursday. The work to identify them, by at least 200 international experts, is likely to take weeks or even months.

Australia sending police

Australia, which had 27 of its citizens on board the plane, says it has 90 police officers in Europe and is sending another 100 with a view to their joining a planned international deployment to provide security at the crash site.

"Australia is close to finalizing an agreement with Ukraine for the deployment of Australian police, some of whom could be armed," Australian Prime Minister Tony Abbott said at a news conference Friday.

"What we want to do is claim our dead and bring them home," he said.

Netherlands has said it is sending 40 unarmed military police to Ukraine, and they're expected to arrive Saturday.

European Union increases pressure on Russia

Earlier Friday, the European Union stepped up pressure against Russians and others it blames for fomenting the crisis in Ukraine, banning visas and freezing the assets of 15 more people and 18 more companies and organizations.

The EU's move aims to punish those supporting the monthslong pro-Russian rebellion in eastern Ukraine.

Details about who was sanctioned Friday weren't immediately available. But the European Union and the United States previously have targeted Russians and Ukrainians they say have assisted the rebellion and Russia's annexation in March of the Ukrainian Black Sea peninsula of Crimea -- such as Vladimir Shamanov, commander of Russian airborne troops.

The move brings the total number of EU sanctions in the Ukraine crisis to 87, and the number of entities to 20. The European Union on Friday also widened its criteria for future sanctions, saying it would now look to punish not only those who are aiding the rebellion, but also those benefiting "from Russian decision makers responsible" for it.