Kabul, Aug 10 (DPA) One Afghan policeman and three militants were killed when a group of Taliban militants attacked government buildings with rockets and small-arms fire in central Afghanistan Monday, officials said.

Around six militants stormed a police checkpoint in Puli Alam, the capital of the central province of Logar, and then occupied a building from where they fired rockets at government buildings, Din Mohammad Darwish, spokesman for the provincial governor, told DPA.

'They fired four rocket-propelled grenades at the governor's office and two at police headquarters,' he said.

'One of the Taliban detonated his explosives close to the governor's office and four or five others were hiding in a three-storey building close to governor's office,' he said, adding that no one was killed in rocket or suicide attacks.

A police officer and two other attackers were killed and one Afghan police and one army soldier were also wounded, Darwish said.

US helicopters were hovering over the town, trying to locate militants, while Afghan forces were advancing towards the occupied building to 'arrest the militants alive', he said.

With five hours from the start of the attack, Afghan police and army forces had still surrounded the building, Gholam Mustafa Mohseni, the provincial police chief said.

'Our forces are waiting for the dark and then we will attack the building,' a police official, who wanted not to be named, said. The security forces asked all residents in the vicinity of the building to vacate their residences before the final assault is conducted, he said.

Taliban spokesman Zabiullah Mujahid said six of their suicide bombers entered the provincial capital and attacked several government offices.