Two bombs went off in the Pakistani port city of Karachi today, injuring at least seven people, ambulance workers said.
They said one bomb exploded on a bus in eastern Karachi, seriously injuring at least five people, and a second, which injured two people, near a mosque in the busy Sadder area in the city's District South.
Five people were injured, all of them very seriously, but so far there have been no deaths, a doctor at Karachi's Civil Hospital said about the first blast.
Workers from the private Edhi Trust ambulance service said the first bomb was left under a seat above the bus's fuel tank.
Hundreds of people have been killed by bomb blasts in Pakistani towns and cities in recent years, but no groups or individuals have claimed responsibility.
Military ruler General Pervez Musharraf vowed last month to control spiralling violence and decreed a new antiterrorism law to combat political, sectarian and ethnic violence.