A Reuters witness heard gunshots and at least two explosions in the west of the Afghan capital Kabul on Friday.
We have received reports of a Taliban attack in west Kabul, a police source said, without giving further details.
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 which the Taliban condemned.
(Reporting by Hamid Shalizi; Writing by Daniel Magnowski)