Pakistani officials say a powerful explosion in a Shi'ite mosque in the eastern city of Sialkot has killed at least 25 people and injured more than 50.
Police say Friday's blast, apparently a suicide bombing, came while hundreds of worshippers were at the religious center for Friday prayers.
After the explosion, soldiers were deployed in the city to restore order as hundreds of Shi'ites protested. Some demonstrators threw rocks at the police and damaged vehicles, while others gathered at the site of the bombing and chanted anti-government slogans.
Police say security forces disarmed a second bomb found outside the mosque.
No group has claimed responsibility for the attack. But Pakistan's Information Minister,Sheikh Rashid Ahmed says it may have been to avenge the death of a terrorist suspect known as Amjad Farooqi, who was killed in a gun battle Sunday.
U.N. Secretary-General Kofi Annan condemned today's bombing and called for calm and restraint in its aftermath.