Islamabad, Dec 18, SPA -- An explosion shattered windows in a government building in the southwest Pakistan city of Quetta on Saturday, police said. It was not clear what caused the blast, which occurred on a third- floor toilet of the civil secretariat. Last week, a bomb intended for a military vehicle killed 10 people and wounded 20 in the city, the capital of Balochistan province. --SPA 1424 Local Time 1124 GMT www.spa.gov.sa/225765