The death toll from the attack on Istanbul's Ataturk Airport has increased to 43, Turkish officials have confirmed.
Some of the 41 victims of the terror attack at Istanbul's Ataturk Airport are being buried as Turkey observes a national day of mourning.
A video has emerged showing people in Ataturk Airport in Istanbul running for their lives as three suicide bombers detonated bombs and exchanged gunfire with security forces.
The CCTV footage, which has no sound, shows people fleeing in panic just before a powerful explosion and the ceiling collapses covering everything in dust.
- Warning: Some viewers may find this footage distressing
People due to travel to Istanbul should speak to their travel company or airline if they have concerns about their journey, the Association of British Travel Agents (ABTA) has said.
It said travellers should follow Foreign Office advice, which says tourists should be alert to their surroundings.
An ABTA spokesman said: "People due to travel should speak to their travel company or airline for information about travel to and from Istanbul. Flights to and from Ataturk International Airport are resuming gradually."
Most British holidaymakers visit the beach resorts on Turkey's southern coast, the association said, adding that "Istanbul’s popularity as a city break destination has declined" following incidents earlier this year.
David Cameron has condemned the "horrific" attack at Istanbul airport.
The prime minister told the House of Commons that he had spoken to Turkish President Erdoğan and offered the UK's assistance.
"Our thoughts and prayers are with those who were killed and injured and their families," Mr Cameron said.
"As yet there are no reports of any UK causalities but the Foreign Office are working urgently with the Turkish authorities to establish the full facts.
"We stand as one in our defiance against these barbaric acts."
The death toll following the attack at Istanbul's Ataturk airport has risen to 41, according to the city's governor's office.
The governor's office said 239 people were injured in the attack, 109 of whom have since been discharged from hospital.
A Turkish official said five Saudis and two Iraqis were among the dead. The official said the other six foreign nationals killed were Chinese, Jordanian, Tunisian, Uzbek, Iranian and Ukrainian.
The attack at Istanbul's Ataturk Airport killed 23 Turkish citizens and 13 foreign nationals, officials there have said.
Reuters earlier reported a Ukrainian and an Iranian were among the dead. Around 150 people were injured in the attack.
The gun and bomb attack at Istanbul's Ataturk Airport is the latest in a series of deadly incidents in Turkey this year.Read the full story ›
Britons in Istanbul have been told to follow the advise of local security forces by the Foreign and Commonwealth Office (FCO).
The latest advice from the FCO said people should speak to their carrier before travelling to the airport.
It said: "If you are in the area follow the advice of the local security forces.
"Please follow Travel Advice for further updates. Flights to and from Ataturk International Airport are resuming gradually. Speak to your carrier for updated travel information before travelling to the airport."
The FCO said it is "generally safe" to travel to Turkey but people should "take additional safety precautions", with the terror threat remaining high.
Three British Airways flights have been cancelled in the wake of Tuesday night's attack at Istanbul's Ataturk Airport.
The airline said the "safety and security" of customers was its top priority and advised people to check for the latest information online.
A BA spokesman said: "Today the BA675 from Istanbul to London Heathrow and the BA676 to Istanbul and the return BA677 from Istanbul to London Heathrow have been cancelled.
"The safety and security of our customers and colleagues is always our top priority, but we are sorry for the disruption to our customers' journeys.
"We are advising customers who are due to travel to Istanbul to keep checking for the latest information on our website ba.com."