A large explosion rips through one of the top floors of the Karachi Police Headquarters

A large explosion rips through one of the top floors of the Karachi Police Headquarters with onlookers running for cover. Terrorists stormed the compound on Thursday killing at least two people amid gunfire and explosions. Police snipers took up positions near the station and all lights in the area were switched off with the city's main thoroughfare Sharae Faisal sealed by security forces.