The Turkish president has accused Moscow of slander for claiming his country buys oil from ISIS as the fallout between the two nations over the downed fighter jet continues to escalate.

Today Turkey refused to apologise for the jet's destruction, though conceded in the face of harsh Russian retaliatory measures it may have acted 'differently' had it known the plane was Russian.

The Turkish military shot the Russian Su-24 warplane close to the Syrian border on Tuesday after they said it entered the country's airspace, causing a rift in relations.

Both pilots ejected from the plane and one, Captain Konstantin Murakhtin, was rescued by Russian special forces after he landed in the forest in rebel-held territory but the other, Lieutenant Colonel Oleg Peshkov was shot dead by rebels.

Turkish president Recep Erdogan, left, lashed out at Russian claims his country buys oil from ISIS. It comes as Russian leader Vladimir Putin, right, says he is still to receive an apology for the downing of a Russian jet by the Turkish military

In the aftermath of the incident, Russia has accused Turkey of paying ISIS fighters in order to buy oil.

But today, Turkish president Recep Tayyip Erdogan lashed out at the claims, calling them slanderous.

Speaking in Ankara he said: 'They claim Turkey is buying oil from Daesh', using another name for ISIS.

'Shame on you. Those who claim we buy oil from Daesh are obliged to prove it. If not, you are a slanderer.'

He told France 24: 'They are lies, they are slander. We have never, never had this kind of commercial relationship with any terror organisation. They have to prove it, and if they can, Tayyip Erdogan will leave office.'

Erdogan also turned on Russia's support of the Bashar al-Assad regime. Russia further enraged Turkey with the launch of its air campaign in Syria in September, accusing Moscow of focusing its fire on moderate rebels rather than ISIS jihadists.

He said: 'Those who carry out a military campaign with the pretext of fighting Daesh are targeting anti-regime opponents.

'You say you are fighting Daesh. Excuse me, but you are not fighting Daesh. You are killing our Turkmen kinsmen hand-in-hand with the regime in order to clear areas north of Latakia.

His comments came as 39 Turkish businessmen attending an agricultural conference in Russia were also deported from the country.

According to Yugopolis, the men had entered Russia on tourists visas when they should have obtained business visas.

The businessmen say they didn't know they had violated immigration laws but were arrested and deported by authorities anyway.

And Moscow tourism chief Oleg Safronov said 'all cooperation with Turkey in tourism will be stopped'.

The Russian Foreign Ministry demanded all its compatriots on holiday in Turkey should return home.

'In connection with the existing terrorist threats on Turkish territory, we once again recommend that Russian citizens refrain from visiting Turkey, and recommend that Russians who are there for personal purposes return home,' said a statement.

Russia vowed to leave a $10 million black hole by urging its tourists to return home, and insisting others do not travel to the country.

The Turkish military shot the Russian Su-24 warplane close to the Syrian border on Tuesday after they said it entered the country's airspace

Captain Murahtin and Colonel Peshkov of can be seen parachuting down after the Sukhoi SU-24 jet was shot down near the Turkish-Syrian border on Tuesday morning

By the end of the year, there would be no Russian tourists in Turkey, he claimed.

Ministers were ordered to 'work out a system of response measures to this act of aggression', said premier Dmitry Medvedev.

One government advisor even demanded Russians stop buying Turkish tomatoes.

'Everyone understands that each Turkish tomato bought in Auchan (supermarket) or a market is a contribution to yet another missile which will be used to shoot at our boys,' warned Gennadiy Onishchenko, formerly Vladimir Putin's top medical guru, now a key Medvedev aide.

Turkish leader Recep Tayyip Erdogan refused to apologise for downing the Russian jet, but claimed if his air force knew it was a Putin plane they would have taken different action.

'If we had known if it was a Russian plane maybe we would have warned it differently,' he said as he faced the Russian economic tourism and tomato blockade.

It was unclear whose plane the Turks believed was overflying their territory when the decision was taken to shoot it down.

Turkey summoned the Russian ambassador to Ankara last night over a violent and 'unacceptable' demonstration outside its embassy in Moscow.

However, in a joint press conference with Francois Hollande at the Kremlin tonight, Putin reaffirmed his belief the downing of the plane was a 'traitor attack' and defended his decision to deploy the fearsome S-400 anti-aircraft systems.

Russian President Vladimir Putin has tonight defended his decision to deploy the fearsome S-400 anti-aircraft systems, stating he would have done so earlier but did not believe his aircraft needed such protection

Putin answered questions from journalists about the row with Turkey at a press conference at the Kremlin tonight where he announced new joint initiatives with France and Francois Hollande (left) in the war against ISIS

Russian S-400 anti-aircraft missile systems are unloaded from a transport plane at an air base in Syria today

The surface-to-air missile systems - which can hit targets at 250miles - were flown to the Middle East in response to the downing of the Russian jet by Turkey

He claimed Russia had given prior information to the U.S. of the flight path of the jet and questioned why this was not passed on to Turkey, a member of the U.S.-led coalition.

He also justified his decision to deploy new weapons systems to Syria, namely the state-of-the-art S-400 anti-aircraft missile battalions.

'We did not have those systems in Syria [previously] because we believed that our airforce was working at an altitude which would not be reachable by terrorists - because they do not have this equipment capable of shooting down the aircraft at 3,000 to 4,000 metres.

'We didn't even think that we could receive a strike from a party that we thought to be our partner. The jets were not defended by anything. If we thought of this before, we would have established the systems capable to protect our aircraft.

'The reason we didn't do this is because we thought Turkey to be a friendly country. We are our establishing our system S-400 which is capable of long range strikes and it is one of the most effective systems of this type in the world.'

Meanwhile Putin also showed his fury with a ruthless bombardment on the region where one pilot was butchered by rebels and another was rescued this week.

Gennadiy Onischenko, who has said that shoppers in Russia should boycott Turkish produce and supermarkets and find another destination for their holidays following the shooting down of a Russian jet by Turkey

Captain Konstantin Murakhtin was one of the two pilots of the Russian fighter jet shot down by Turkish F16 pilots near the Syrian border on Tuesday - he has now vowed to continue flying missions

'As soon as our pilot was safe, Russian bombers and artillery of the Syrian government forces carried out massive strikes in the indicated area for an extended period,' military official Igor Konashenkov told Russian news agencies.

'The terrorists operating in that area and other mysterious groups were destroyed.'

Some of these elements are seen as pro-Turkish.

In three days Russian jets carried out 134 combat sorties over war-torn Syria and struck 449 targets in the Aleppo, Damascus, Idlib, Latakia, Hama and Homs and Deir Ezzor provinces, said Konashenkov.

Speaking at the Kremlin today, Putin complained that he has not received an apology from Turkey nor an offer 'to make up for the damages.'

He added that he regretted the fact that relations between Turkey and Russia have been driven into a stalemate.

Meanwhile Russia also confirmed it would be reinforcing control over Turkish food imports, citing frequent violations of safety standards.

Both Captain Murakhtin (left) and Lieutenant Colonel Oleg Peshkov (right) parachuted out of the jet, but only Captain Murakhtin survived, while his co-pilot was shot and killed by Syrian rebel forces

Some 15 per cent of Turkish agricultural produce does not meet Russian standards with levels of pesticides and nitrites considerably above safe limits, Agriculture Minister Alexander Tkachev said.

'Taking into account repeated violations by Turkish producers of Russian norms, the Russian government has tasked (the food safety agency) Rosselkhoznadzor with reinforcing control over supplies of agricultural produce and food from Turkey,' Tkachev said.

Russia will 'organise additional checks at the border and at food production sites in Turkey,' he added.

His comments come as Captain Murakhtinv vowed to continue flying missions over Syria as 'payback' for his commander.

He has also claimed the pilots were given no warning they were violating Turkish airspace.

Tensions: Russia's S-400 anti-aircraft systems (pictured) are highly advanced and capable of striking jets travelling up to 250miles away

He said: 'I can't wait to return [to flying] … I have a debt to repay to the commander.' The airman told Russian TV that he wanted to keep flying missions from the base to 'pay them back for my commander'.

He also flatly denied there were any warnings from Turkish F16 pilots that his plane was about to be shot out of the sky.

He said: 'There was no warning, by radio exchange nor visually. There was no contact at all. The Turks did not get in touch with us.'

Captain Murakhtin is from a family of Russian air force pilots - his father was a lieutenant colonel, and also a co-pilot in charge of navigation.

He continued: 'We were flying at about 6,000-metre altitude. The weather was sunny, what we call 'million-by-million'. All the flight before the moment when the missile exploded was completely under my control.

'I could clearly see with the map and visually where the borders were and where we were. There even wasn't a threat of entering Turkey.'

Captain Murakhtin was captured by rebel forces on the ground after parachuting from the jet, and was saved by Russian military in a 12-hour joint operation with Syrian government forces

Safe and sound: Captain Murakhtin, reportedly pictured with his wife, is now at a Russian air base in Syria

Russian soldier named Alexandr Pozynich was killed during the 12-hour operation to rescue Captain Murakhtin

He was speaking at an press conference held at the Russian Hemeimeem air base in Syria after his rescue.

'If they wanted to warn us, they could have showed themselves by flying at a parallel course. But there was nothing. And the missile hit the tail of our plane all of a sudden. We didn't see it visually. To have enough time to do an anti-missile manoeuvre' he added.

Captain Murakhtin told of how he landed in rebel held territory where he spent several hours hiding in a forest before being found using his radio beacon.

He was rescued after an 18-strong Syrian SWAT team backed by six fighters from the elite division of Shia Hezbollah movement, and then spirited to the Hemeimeem air base.

Meanwhile Putin announced that Captain Murakhtin and the other participants, including in the rescue operation, would be awarded state honours.

He added Colonel Peshkov will posthumously be given Russia's highest award for valour, the Hero of Russia medal.

The 52-year-old was married, with a daughter, 16, and son, eight. The mayor of his city of Lipetsk promised last night to pay off the family's mortgage on a recently-purchased flat.

'We will help his family to pay off this debt,' vowed Mikhail Gulevsky.

Honoured soldier: Naval Infantry Soldier Alexandr Pozynich, a married father-of-one, will be awarded the Order of Courage

A Russian soldier named Alexandr Pozynich who was killed during the 12-hour operation, possibly while carrying out a search-and-rescue in a helicopter, will also be honored.

The Free Syrian Army released footage of one of their fighters using an anti-tank missile to blow up a Russian military helicopter shortly after it landed, but claimed that the pilot had left the aircraft.

Pozynich's widow, Irina, 28, mother of their four your old son Maxim, said: 'It's very painful now. I can't speak.'

She added: 'I don't understand how and why it happened. It feels like it happened to someone else. When he went to Syria, he did not have any bad feelings. It was as usual.

'He was in the same mood as usual but but for me - something was wrong. My heart was heavy. I did not understand why...'

Russian military expert Vladislav Shurygin said the Turks had been 'catching' Russian planes for days, and when the Russian jets took off, they were to be accompanied by up to six Turkish F-16s in the air.

He said the missile fired from one of the Turkish jets hit the engine of the plane and both of the pilots ejected. Colonel Peshkov, 52, was shot dead in the air by rebels on the ground.

'Proof': This image (left) accompanied by a video (right) claims to show Colonel Peshkov after his death

Retaliation: At least 12 Russian air strikes hit Turkoman Mountains in Latakia's northern countryside, the rebel-controlled area where the Sukhoi SU-24 fighter jet was shot down by the Turkish army

Disturbing footage shows the pilot, still wearing his seat belt, covered in blood and bruises after being captured by Turkmen. The rebels claimed they had also shot dead Captain Murakhtin.

But he survived after landing in an area covered by forest, Mr Shurygin said, adding: 'It gave him some advantage and he managed to escape from the place where he landed before a group of Islamists arrived.

'All day long, gangs of militants were checking the area searching for a Russian aviator but couldn't find him… An active radio exchange began which means that Turkish interceptors immediately passed the information about the aviator's location to the militants.

'When it got dark, several of our SWAT teams went to the area, as did a Syrian SWAT operating in this area.'