NEW : Rescue workers continue to discover bodies , a Karachi official says . The blast apparently targeted Shiites in Karachi , police say . A timing device triggered the 150 kilograms of explosives , police say . Islamabad , Pakistan ( CNN ) -- At least 42 people died and another 145 were wounded in a massive car bombing Sunday in the large Pakistani seaport city of Karachi , authorities said . Police say the death toll will rise as more bodies are found in rubble .
NEW : Rescue workers continue to discover bodies , a Karachi official says . The blast apparently targeted Shiites in Karachi , police say . A timing device triggered the 150 kilograms of explosives , police say . Police say the death toll will rise as more bodies are found in rubble .