Three foreign advisers and an Afghan interpreter were killed Tuesday when a Taliban suicide bomber blew himself up outside Kabul International Airport. The nationalities of the foreign advisers are yet to be identified, according to a Reuters report.
The attack comes days after a previous one by the Taliban, who used a car bomb to capture a building within the airport and battled Afghan security forces for five hours before being killed. A Taliban spokesman, Zabihullah Mujahid, claimed responsibility for Tuesday's attack.
"In this successful attack up to 15 invader soldiers were killed or wounded and many vehicles were damaged," he said, according to Reuters.
Kabul International Airport, which is used by both civilian and military aircraft, is also home to a major operational base for U.S.-led NATO forces.
The heavily-guarded facility airport facility has been a target of frequent but ineffectual militant rocket fire. However, frontal attacks on the airport, while rare in the past have increased in frequency in the past few weeks as the Taliban has stepped up its offensive in response to the ongoing presidential elections.