**12 Killed in Pakistan Blast**
Officials in southwest Pakistan say an explosion has ripped through a vehicle used by security forces, killing at least 12 people -- 11 security personnel and a civilian. Nearly two dozen people were wounded in the assault.
Police officials say a remote controlled car bomb targeted a vehicle carrying police special forces in Quetta Thursday. Authorities say the bomb contained about 100 kilograms of explosives.
Quetta is the capital of Baluchistan province, which has been the center of a low-level insurgency for years.
Elsewhere Thursday, militants attacked a security checkpoint in northwest Pakistan, killing four soldiers.
**British PM called the killing a terrorist incident **
British Prime Minister David Cameron was meeting Thursday with his top security advisers, one day after a man was butchered to death in broad daylight on a south London street near an army barracks.
Mr. Cameron called the killing "appalling," saying there are strong
indications it was a terrorist incident. He chaired an emergency national security meeting after cutting short a visit to France.
Scotland Yard's counterterrorism unit is leading the investigation, but few details have been officially released.
Police shot and wounded the two suspects and they are under guard in a hospital. The victim is believed to be a British soldier, but has not yet been publicly identified.