At least 11 police officers and dozens of people were wounded in this attack in Pakistan's southern city of Karachi. An explosion ripped through two police vehicles in Razzaqabad, near a police training centre. Police cordoned off the site, as officials examined the wreckage, collecting debris for clues into who was responsible for the blast. There were more than 45 personnel on the bus on their way to resume duties. Ambulances moved the wounded to Jinnah hospital for emergency treatment.