A bomb ripped through a bus terminal in this southwestern city and killed three people, police said Monday.

They said no one claimed responsibility for the Sunday explosion, which also injured five people.Quetta, about 60 miles from the Afghan border, is surrounded by tent villages housing thousands of Afghans seeking refuge from 10 years of civil war in their country.

Dawn, an English-language daily newspaper published in Karachi, said one of the dead was an Afghan refugee and the other two were Pakistani nationals.