KABUL, Afghanistan (AP) — An Afghan official says at least six mortar rounds have landed in the eastern part of the Kabul international airport.

Najib Danish, spokesman for the Afghan Interior Ministry, says Wednesday there are no reports of casualties from the attack.

Zabihullah Mujahid, Taliban spokesman, claimed responsibility for the attack on his official Twitter account.

The attack comes as U.S. secretary of Defense James Mattis and NATO Secretary-General Jens Stoltenberg are in Kabul for a visit and were scheduled to hold a joint news conference with Afghan president Ashraf Ghani.

Tumor Shah Hamedi, director of the Kabul airport, says all flights have been halted as result of the mortar attack at the airport.