Fallujah, Iraq ? Iraq’s hit-and-run resistance struck U.S. forces in this tense city west of Baghdad for a second day Monday, killing one American paratrooper and wounding six others, the U.S. command reported.

Two civilians were killed in the clash, including one whose family said he was shot by the Americans after they detained and handcuffed him. The Pentagon said it had no information on the claim, and U.S. military spokesmen in Iraq had no immediate comment.

Fallujah is among the most dangerous cities for American troops in the “Sunni Triangle” to the north and west of Baghdad, where resistance to the U.S. occupation is most intense.

Early today, the U.S. military said coalition troops and Iraqi security forces were “taking action against criminal elements” in Karbala, the city where an American lieutenant colonel was killed in a firefight outside the home of a Shiite Muslim cleric on Thursday. The Central Command office in Baghdad refused to provide any other details.

Efforts to reinforce embattled American troops in Iraq suffered new setbacks Monday, with Bangladesh ruling out sending soldiers and Iraqi tribal leaders renewing demands that Turkish troops stay at home.

In Monday’s midday raid, insurgents attacked a dismounted patrol from the 82nd Airborne Division, first with a homemade bomb and then with small-arms fire, the U.S. command said. The patrol consisted of about 30 soldiers accompanied by five Humvees.

Reporters and Iraqi witnesses said the paratroopers raked the area with return fire, then raided a mosque and houses looking for the attackers. They detained at least nine Iraqis, including a woman, residents said.

At Fort Bragg, N.C., military spokesmen said the dead paratrooper was assigned to the 1st Battalion of the 505th Parachute Infantry Regiment.

The clash came a day after rocket-propelled grenades destroyed a U.S. Army ammunition truck that had broken down on the highway east of Fallujah. One civilian was killed and four were wounded in the explosions or in the U.S. gunfire that followed.

U.S. Army soldiers secure the area after assailants ambushed a U.S. Army foot patrol outside Fallujah. One American soldier and two civilians were killed and five others wounded Monday, the second day of attacks. The patrol, from the 82nd Airborne Division, was first hit by an exploding homemade bomb, and then by small-arms fire, the military said.

No U.S. casualties were reported in Sunday’s attack, which set off celebrations among Iraqi youths.

The latest U.S. deaths brought to 104 the number of Americans killed by hostile fire since President Bush declared an end to major combat May 1.

A total of 339 Americans have died since the March 20 invasion of Iraq, 218 of them in combat.

The Bush administration hoped last week’s passage of the new U.N. Security Council resolution, which urges other nations to contribute troops and money, might bring reinforcements to help restore order in Iraq.

On Monday, however, Bangladesh, a frequent contributor to U.N. peacekeeping missions, said the new resolution doesn’t meet its key condition for sending troops: that the United Nations, not the United States, play the primary role in Iraq’s transition.