Gunmen attacked an area around a security base and training center for Afghanistan's intelligence service in Kabul on Thursday, holding off security forces for hours before being killed.

The incident comes at a time of high tension after a series of attacks across Afghanistan, including a full-scale assault on the city of Ghazni by the Taliban last week that killed as many as 150 civilians and destroyed houses and a local market.

There was no immediate word on any casualties from Thursday's attack, the latest in a long series to target military and intelligence facilities in Kabul.