BAGHDAD, Iraq — Roadside bombs killed more U.S. troops in Iraq during October than in any previous month of the war, continuing a trend that's made the homemade explosives the primary threat to U.S. forces in Iraq.
Capping the bloodiest month for U.S. troops since January, the U.S. military reported Monday that seven more U.S. service members were killed — all victims of increasingly sophisticated "improvised explosive devices," or IEDs.
Bombs also claimed a toll Monday among civilians in Basra, Iraq's second-largest city and the major metropolis of the Shiite-dominated south, which has witnessed less violence than Sunni areas. A large car bomb exploded along a bustling street packed with shops and restaurants as people were enjoying an evening out after the daily Ramadan fast. At least 20 were killed and about 40 wounded, police Lt. Col. Karim al-Zaidi said.
Military commanders have warned that Sunni insurgents will step up their attacks in the run-up to the Dec. 15 election, when Iraqis will choose their first full-term parliament since the collapse of Saddam Hussein's regime in 2003.
To guard against such attacks, the military has raised the number of U.S. troops in Iraq to 157,000 — among the highest levels of the conflict.
Friday, a homemade bomb killed Col. William W. Wood, 44, of Panama City, Fla., an infantry battalion commander. He was promoted posthumously, making him the highest-ranking soldier killed in action in the Iraq conflict, according to the Pentagon.
"We see an adversary that continues to develop some sophistication on very deadly and increasingly precise standoff-type weapons — IEDs, in particular," Pentagon spokesman Lawrence Di Rita said Monday.
The insurgents continually search for new and more effective ways to use IEDs, Di Rita said, while U.S. forces look for new ways to counter the threat.
"We're getting more intelligence that's allowing us to stop more of these things, find more of them. So we're learning from them and the enemy is learning from us, and it's going to be that way for as long as there is an insurgency," Di Rita said.
Monday's worst attack against U.S. troops came in an area known as the "triangle of death." Four soldiers from the U.S. Army's Task Force Baghdad died when their patrol struck a roadside bomb in Youssifiyah, 12 miles south of Baghdad.
Two other soldiers from the Army's 29th Brigade Combat Team were killed in a bombing Monday near Balad, 50 miles north of the capital. The U.S. military also reported that a Marine died the previous day in a roadside bombing near Amiriyah, an insurgent hot spot 25 miles west of Baghdad.
The U.S. military death toll for October is now at least 92, the highest monthly total since January, when 106 U.S. service members died — more than 30 of them in a helicopter crash ruled an accident. In only two other months since the war began has the U.S. military seen a higher toll: in November 2004, when 137 Americans died, and in April 2004, when 135 died.
The latest deaths brought to 2,025 the number of U.S. service members who have died since the war began in March 2003. The number includes five military civilians.
The ongoing violence has killed a far greater number of Iraqis.
"They're obviously quite capable of killing large numbers of noncombatants indiscriminately, and we're seeing a lot of that, too," Di Rita said.
Public safety has deteriorated in recent months in Basra largely because of feuding among rival Shiite extremist groups that have infiltrated law enforcement. The city had previously been much more peaceful than Baghdad and cities within the volatile central, northern and western areas of the country where the Sunni Arab-led insurgency rages.
Earlier Monday, Marines backed by jets attacked insurgent targets in a cluster of towns and villages near the Syrian border. The raid was part of an ongoing operation in an area believed to be heavily infiltrated by the group al-Qaida in Iraq and foreign fighters.
A Marine statement said U.S. aircraft fired precision weapons, destroying two safe houses believed used by al-Qaida figures. The statement made no mention of casualties, but Associated Press Television News video showed residents wailing over the bodies of about six people, including at least three children.
At the local hospital, Dr. Ahmed al-Ani said 40 Iraqis, including 12 children, were killed in the attack. But the claim could not be independently verified, and figures from the area have sometimes proved to be exaggerated.
The footage showed Iraqi men digging through the rubble of several destroyed concrete buildings with a pitchfork or their hands. In the building of a nearby home, women wept over about half a dozen blanket-covered bodies lined up on a floor. Some of the blankets were opened for the camera, showing a man and three children.
"At least 20 innocent people were killed by the U.S. warplanes. Why are the Americans killing families? Where are the insurgents?" said one middle-age man who didn't give his name. "We don't see democracy. We just see destruction."
The Associated Press and Knight Ridder Newspapers contributed
to this report