18 Shiites, Sunnis Die in Muslim Feud

Gunmen opened fire in a Shiite mosque during morning prayers, one of four attacks on the group that left 14 dead in Pakistan. Police said that a retaliatory assault on a Sunni Muslim school killed four students and that the violence was the latest in a bitter feud between extremist members of the two Muslim branches. The violence began when armed attackers killed nine Shiites in the mosque in the city of Karachi. Another five people were killed in three other incidents in the eastern Punjab province. In retaliation, gunmen attacked a Sunni Muslim school in Karachi, killing four, police said.