BAGHDAD, Iraq — Iraq's prime minister told parliament today Iraqi security sweep in the capital would not be the last battle against militants, who he said would not be safe anywhere in the country.

Prime Minister Nouri al-Maliki did not reveal the details of the plan, which he has dubbed "Operation Imposing Law," or say when it would begin.

But he promised to go after those behind Baghdad's rampant violence no matter where they tried to hide, although he promised to ensure the human rights of innocent Iraqis.

"We are full of hope. We have no other choice but to use force and any place where we receive fire will not be safe even if it is a school, a mosque, a political party office or home," he said. "There will be no safe place in Iraq for terrorists."

His comments came a day after U.S. and Iraqi troops battled Sunni insurgents holed up in high-rise buildings on Haifa Street in the heart of Baghdad, with snipers on roofs taking aim at gunmen in open windows as Apache attack helicopters hovered overhead.

The Defense Ministry said 30 militants were killed and 27 captured Wednesday.

The military reported separately that an American soldier was killed Wednesday in clashes near the city's center, but officials declined to give more specifics or say whether the death was connected to the Haifa Street fighting. Two U.S. Marines also were reported killed Tuesday during combat in Anbar province, the military said.

Government spokesman Ali al-Dabbagh said the latest joint raid was aimed at clearing the area, which sits just north of the heavily fortified Green Zone, of "terrorists and outlaws" targeting residents. He promised such operations would continue as U.S. and Iraqi troops prepare for a broader security crackdown to stanch the sectarian bloodletting that has turned Baghdad into a battlefield.

But the operation drew condemnation from a Sunni group that said it was further proof that the Shiite-led government was targeting the minority sect.