KABUL — Taliban insurgents wearing suicide vests attacked the Kabul traffic police headquarters before dawn Monday, police said, and eyewitnesses heard numerous explosions while a gun battle was still raging four hours later.

Police officer Mirza Mohammad said at least one insurgent blew himself up at the entrance to the compound and a number of others wearing suicide vests entered the building. Another police officer said at least three attackers entered the building and two were killed. The officer, who could not be named because he was not authorized to speak to the media, said a gun battle was taking place inside the three-story building.