President Bush said Sunday he was outraged by the church attack Sunday in Pakistan that killed a U.S. Embassy employee and her daughter. He pledged to find those responsible and bring them to justice.

Two attackers hurled grenades into a Protestant church filled with worshippers in Islamabad, Pakistan. Five people, including the Americans, were killed, and 45 others were injured, police and U.S. officials said.

The U.S. Embassy in Islamabad identified the Americans as Barbara Green, who worked in administration at the embassy, and her daughter Christin Woolsley, a senior at the American School in Islamabad. Green's husband works in the embassy's computer division.

Bush said it was a terrorist attack. "I strongly condemn them as acts of murder that cannot be tolerated by any person of conscience nor justified by any cause," he said in a statement.

The Protestant International Church is in a heavily guarded diplomatic enclave about a half-mile from the U.S. Embassy.

No group claimed responsibility. Suspicion fell on Islamic militants angered by Pakistani President Gen. Pervez Musharraf's crackdown on Islamic extremism that began in January.

"We will work closely with the government of Pakistan to ensure those responsible for this terrorist attack face justice," Bush said.