This report is developing and will be updated as more information become available.

Update: The Pentagon has confirmed 11 Marines and one Navy medic were killed in the suicide bombings.

Update: At least 10 U.S. Marines were killed in Thursday’s attacks.

Update: The Wall Street Journal has reported that four U.S. Maries were killed in the Kabul airport explosion. Washington Post reporter tweets remaining planned evacuations have been canceled, leaving U.S. citizens and allies trapped in Afghanistan.

The U.S. ambassador in Kabul has told staff there that four U.S. Marines were killed in an explosion at the city’s airport and three wounded, a U.S. official with knowledge of the briefing said. Two explosions ripped through crowds of Afghans trying to enter the airport on Thursday.

At least three U.S. troops were injured, a U.S. official said. Witnesses reported multiple fatalities among the Afghans, many of whom were trying to enter the airport because they had assisted U.S.-led coalition efforts and feared persecution by the Taliban.

Update: The Pentagon has confirmed a second explosion and confirmed U.S. casualties, so far it’s unclear the exact number of injuries and fatalities from the pair of attacks.

UPDATE: There has been a report of a second explosion:

The Pentagon has confirmed a major explosion at the Kabul airport in Afghanistan. So far there are no reports of possible casualties from the explosion. The explosion comes hours after threats of an attack prompted shutdowns at the airport forcing fleeing Americans and Afghans to leave. In days since the Taliban’s takeover, massive crowds have swarmed the airport with people trying to leave the country, reports have confirmed the Taliban has set up check points around the airport making it more difficult and dangerous to access.

According to reports by CNN, the explosion has been confirmed and President Biden has been briefed on the situation. A Pentagon briefing is scheduled to take place within the hour.

So far, it’s unclear how this will affect evacuations from the airport as the August 31 deadline swiftly approaches. CNN has speculated that terrorist groups ISIS or Al Qaeda could be behind the attack by using a suicide bomber.

CNN’s Chief White House correspondent Kaitlan Collins tweeted about the explosion.

Afghanistan reporter Bilal Sarway tweeted that there are multiple casualties and fatalities but this has not yet been confirmed.

ABC reporter James Gordon Meek also tweeted that there are multiple fatalities in the area resulting from the blast.