Three unidentified militants detonated a car bomb Friday and tried to storm the headquarters of an Afghan party headed by veteran politician Gulbuddin Hekmatyar, officials said.

Ghairat Baheer, an official with the Hizb-e-Islami party, said two attackers were killed as they tried to enter the Kabul building — which also houses a mosque — and a third escaped.

“The car detonated outside, so there was little damage,” he said.

Officials said Hekmatyar — a wily politician who served as prime minister in the 1990s — was inside at the time, but was unhurt.

Obaidullah Muddabir, a senior district police officer, confirmed two attackers had been killed, but said he believed the third had been captured.