Karachi
Media playback is unsupported on your device
Video

Pakistan: Karachi gunmen kill 12 at Mehran air base

Pakistani troops have ended a siege by militants who attacked a naval base in the city of Karachi, navy sources say.

The troops are now said to be "mopping up" after the raid, which has left at least 12 soldiers dead.

The attackers were said to have been holed up in an office building with hostages after storming the Mehran naval aviation base overnight.

The BBC's Aleem Maqbool reports from Islamabad.

Go to next video: Kalash valley's unique culture