Suicide bombers attack west Kabul police station

"At least four suicide bombers carried out an attack on a police station," the source said, adding that one bomber detonated his explosives. Police were still fighting the others, who were armed with machine guns and rocket-propelled grenades, the source said.

Earlier, a Reuters witness heard gunfire and at least two explosions.

The Taliban generally target military personnel or foreigners, such as in the attack on a convoy of NATO-led International Security Assistance Force (ISAF) vehicles in late October, which killed 13. That attack was also in the west of the city, an area which does not have a high concentration of foreign residents.

A huge suicide bomb killed 80 people at a Shi'ite Muslim shrine in Kabul last week, an attack the Taliban condemned.

(Reporting by Hamid Shalizi; Writing by Daniel Magnowski)