Bomb blast outside cable TV office kills 3 people in Karachi, Pakistan's largest city

Police say a bomb blast outside a cable TV office in southern Pakistan has killed three people and wounded four others.

Police officer Sadaqat Ali said Friday the bomb was planted in a rickshaw and went off after midnight in Pakistan's largest city, Karachi.

He says the motive behind the bombing was unclear, and police are investigating.

Karachi is a sprawling metropolis of roughly 18 million people and has a long history of political, sectarian and ethnic violence.

The latest bombing comes two days after gunmen shot and killed Perween Rahman, a pioneering female activist who helped bring services like sewers and water to the city's poorest neighborhoods.