U.S. forces battled the tattered remnants of Iraq's army for control of downtown Baghdad on Tuesday, crushing a counterattack and seizing a military airport.

Iraqi leader Saddam Hussein's fate is still unknown after an massive bombardment on Monday.

Marines battled snipers as they fought deeper into the capital from the east. They seized the Rasheed Airport and captured enough ammunition for an estimated three thousand troops.

The toll on civilians from four days of urban combat was unknown. But the World Health Organization said Baghdad's hospitals were running out of supplies to treat the burns, shrapnel wounds and spinal injuries caused by the fighting.

Two cameramen were killed and at least three others wounded when an American tank fired a round into the Palestine Hotel, headquarters for hundreds of journalists. Commanders said hostile fire had been coming from the building, but the journalists said they witnessed none.

Separately, the Arab television network al-Jazeera reported that a U.S. warplane attacked its office on the banks of the Tigris River, killing a reporter.