Blast targets Nato Afghan base

A bomb has exploded in an insurgent attack on a US-led coalition base in eastern Afghanistan, say Afghan officials.

There was no official information about casualties in the explosion, outside Khost.

Nato confirmed that insurgents had attacked a coalition base in the east, but did not disclose the location.

Police described a very strong blast.

One officer at the scene says it occurred at Camp Salerno and six civilians were wounded.