Tracking the latest updates from the shocking attack on Pakistan's busiest airport, the Jinnah international airport in Karachi.

4.36 pm: Red alert across Pakistan after second attack

After the second attack in Karachi today, a red alert was declared across Pakistan.

Daily Times reported that High alert has been announced at Islamabad/Rawalpindi, Lahore, Peshawar, Multan, Sukkur, Nawabshah and Quetta airports. Holidays of Airport Security Force personnel at all airports were also cancelled.

3.40 pm: It wasn't an attack, claim Karachi police

The Karachi police has meanwhile claimed that there was no second attack on the Karachi airport.

Karachi police tells press conference that no fresh attack at airport, a reporter asks if it was just celebratory fire we all saw — Saeed Shah (@SaeedShah) June 10, 2014

2.31 pm: Combing operation on to find terrorists

Reports suggest that there were three to four terrorists involved in the second attack in Karachi. However TV reports say that a combing a operation is on to find the terrorists who fled after the attack.

2.11 pm: Gunmen escape, search operations on

After brazenly opening fire at the security camp on Karachi airport, militants managed to escape. Pakistan authorities have launched a massive search operation to find the militants.

"Police, army contingents immediately reached airport. Things are under control and normal flight operations are on," a Pakistani army official said.

The attack which took place in a shanty area which gave militants the opportunity to escape, ARY news reported.

The assault came as Pakistan launched air strikes on a militant-infested tribal district, killing 15 people in apparent retaliation for Monday's assault, AFP reported.

1.51 pm: Nawaz Sharif orders action against militants

Prime Minister Nawaz Sharif has ordered action against the militants and control the situation, ARY news reported.

Terrorists are allegedly hiding inside the ASF Acedemy to retaliate against security forces. The ASF Acedemy has three gates and terrorists have attacked the facility from a ‘Lady Hostel’ gate.

CNN-IBN reported The location of the attack, Pehlwan Goth is a shanty area that overlooks the western part of Karachi Airport's runway from where planes normally take off.

1.42 pm: Militants want to prolong attack, take hostages, says interior minister

Pakistan Interior Minister Chaudhry Nisar Ali Khan said that militant intend to take hostages as reports of fresh attacks on an ASF camp near the airport were reported. "Terrorists wanted to prolong attack, take people hostage," said Interior Minister Chaudhry Nisar Ali Khan, Times Now reported

Meanwhile, security forces started an aerial surveillance of the area to locate the militants.

1.26 pm: Five to nine terrorists attack airport security force camp, flight ops suspended

Even as gun battled raged near Karachi airport, reports showed that militants have attacked Airport Security Force and attempted to enter it, ARY news reported.

Meanwhile all flight operations have been suspended as Pakistan army made their way back to the airport to assist paramilitary troops who have been engaged in a gunfight with militants.

1.16 pm: Karachi airport attacked again, fresh shooting reported

A day after the bloody siege ended with 34 dead, heavily armed militants attacked Karachi airport again. Pakistan forces and militants are exchanging fire at two locations at the airport, ARY news reported.

Security forces are engaged in a gun battle at the Airport Security Force (ASF) camp number 2, which is located at the ASF academy in Bitai Abad, Pehlwan Goth in Karachi, DawnNews reported. Firing was also reported outside the ASF academy.

The area was cordonned off by rangers and ASF troops to prevent militants from entering the area.

End of updates for 9 June

2.07 pm: Indian Home Ministry issues advisory, puts all airports on alert

Following the brazen attack at Karachi airport, the Indian Union Home Ministry today issued advisories to all Indian airports and put them on alert, tightening security.

11.31 am: Paramilitary spokesperson says Karachi airport cleared of militants

Pakistani security forces said they had cleared the Karachi airport of militants nearly 12 hours after the start of a siege that left at least 24 people dead, a paramilitary official said.

"The attack is over and we have cleared the area of all militants, and we will hand over the airport to the Civil Aviation Authority at at 12.00 pm (0700 GMT)," paramilitary Rangers spokesman Sibtain Rizvi told reporters, AFP reported.

11.11 am: Fresh shots were fired at a different location within the airport

Geo TV reported that the shots were fired at about 8:30 in the morning after the army said the airport had been swept for militants and ammunition. The location of the firing in the morning was different from where the attacks took place last night.

However, due to security concerns, location of the firing was not disclosed.

10.00 am: Two explosions heard inside airport

Two explosions have just been heard inside the Karachi international airport.

Although it is not yet known what may have caused the explosions, there is speculation that the militants still inside the airport have blown themselves up.

The Pakistani military relaunched security operations a short while ago amid fresh firing from inside the airport.

Meanwhile Indian airports have also been put on high alert.

9.30 am: Pakistan military relaunches security operations

The Pakistan military has relaunched security operations inside the Karachi airport, as fresh firing was heard inside a workshop area of the Karachi international airport. One Pakistan Ranger is reportedly injured.

"We have relaunched the operation and called in additional troops," said Sibtain Rizvi, spokesman for the Rangers paramilitary force, adding that one police officer had been injured in the firing.

An AFP reporter at the scene said gunshots could be heard inside the airport and that rangers and elite commandos were rushing inside.

The initial assault at the Jinnah International Airport began late Sunday and raged until dawn, when the military said that all 10 militants had been killed.

Equipped with suicide vests, grenades and rocket launchers, they had battled security forces in one of the most brazen attacks in years in Pakistan's biggest city. Among the 14 victims were security personnel and four airport workers.

Three militants are believed to be still inside.

Meanwhile Geo News quoted Pakistani rangers as saying that a sweep was still on, adding that forces had also recovered injections and AK 47's from the site. "The injections may have been to quell pain in case of injury", one official told the agency.

9.17 am: One security man injured in fresh firing at Karachi airport

The latest reports coming in indicate that one person has been injured in fresh firing at the Karachi international airport. Express News Pakistan has reportedly said that there are three terrorists still inside the airport.

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Meanwhile Pakistan security forces have cordoned off the area around the Jinnah International airport.

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The latest trouble came with tensions already high over the arrest in Britain of the exiled leader of Pakistan's MQM party, which dominates politics in Karachi -- Pakistan's economic centre and main port.

9.10 am: Fresh firing heard at terminal 1

There are now reports coming in of fresh firing at the Karachi airport. Pakistan media channels are saying that the firing has been heard at a workshop area inside the airport.

It was not immediately clear what the cause was. Earlier the Pakistan army said that all the terrorists involved in the attack on the airport had been killed.

Further information is awaited.

8.57 am: All attackers were of Uzbek nationality, say DG rangers

DG Rangers Sindh Major General Rizvan Akhtar has confirmed the identity of all terrorists- All Uzbeks, at a press conference by the DG Rangers.

The press conference also revealed that there were 3 suicide bombers among the 10 attackers, while the other 7 were killed by security forces.

8.54 am: Security stepped up in Islamabad, Lahore

The Benazir Bhutto International Airport in Islamabad and the Allama Iqbal International Airport in Lahore have also been placed on ‘red alert’ following the deadly Taliban attack on the Karachi airport.

Additional security personnel were deployed around areas of the airports and additional police personnel were deployed.

“All security agencies may be involved to ensure the protection of an installation at this alert level,” an airport official told Dawn.

8.26 am: Hafiz Saeed blames Modi

JUD chief Hafiz Saeed, who is widely believed to be the mastermind of the 26/11 attacks on Mumbai, has said that Narendra Modi's 'new security team' is responsible for the attack on the Karachi airport, despite the Taliban claiming responsibility.

In a series of tweets, Saeed claimed that the nation knew who the 'real enemy' was and called on the Pakistani government to 'show some spine' and end relations with India.

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8.02 am: Tehreek-e-Taliban claim responsibility for Karachi airport attack

The Tehreek-e-Taliban have claimed responsibility for the attack on the Karachi airport.

The militants claimed responsibility a few hours after the Pakistan army said that a six hour siege of the airport had ended.

Although it was not clear what reasons the Tehreek-e-Taliban had given for the attacks, they come even as government-led peace talks with the local Taliban faction and other militants have floundered in recent weeks.

7.38 am: Pak army says Karachi airport attackers carried 'Indian made' weapons

With the attack on the Karachi international airport finally ending, attention is now turning to who is responsible for the audacious 26/11 style attack. No one has claimed responsibility so far.

While some reports have implicated the Taliban, a news report by India Today quoted the Pakistan Rangers as saying that the weapons recovered from the militants are of Indian make.

There has however been no official claim made in this regard as yet.

6.30 am: Pakistan army declares military operation over

Pakistan's army spokesman declared an end to a military operation following a six-hour long siege of Pakistan's busiest airport in the southern city of Karachi Monday. "Update: Area cleared. No damage to aircraft, fire visible in pics was not plane but a building, now extinguished. All vital assets intact," tweeted Major General Asim Bajwa at 4:35 am (1135 GMT Sunday).

Bajwa added that a total of 10 militants were killed in clashes with security forces, and that ammunition, rockets and RPGs were recovered from the attackers, who wore "big packs". "Precautionary sweep after day light. Airport will be cleared by mid day for operations, handed back to CAA (Civil Aviation Authority)/ASF (Airport Security Force). Pakistan Zindabad (long live Pakistan)!" he later tweeted.

5.30 am: Militants disguised as airport security launch 26/11 style attack on Karachi airport

Gunmen disguised as police guards attacked a terminal at Pakistan's busiest airport Sunday night with machine guns and a rocket launcher, killing at least 13 people as explosions echoed into the night, officials said. A separate suicide bombing in the country's southwest killed 23 Shiite pilgrims returning from Iran, authorities said.

No one immediately claimed responsibility for the attack on the Jinnah International Airport in Karachi, nor the suicide bombing in Baluchistan province. However, the attacks come as government-led peace talks with the local Taliban faction and other militants have floundered in recent weeks.

Heavy gunfire and multiple explosions could be heard coming from the terminal, used for VIP flights and cargo. A major fire rose from the airport, illuminating the night sky in an orange glow as the silhouettes of jets could be seen. The deadly operation was carried out by 10 militants, said the Chief Minister of Sindh province, Qaim Ali Shah.