The new U.S. ambassador expressed horror Tuesday at the level of violence in Iraq and said Islamic extremists and former members of Saddam Hussein's outlawed Baath Party were using Iraqis as "cannon fodder."

The comments by U.S. Ambassador Zalmay Khalilzad (search) came after a four-day, U.S.-led offensive, "Operation Spear," aimed at preventing foreign fighters from entering Iraq from Syria, ended late Monday in western Anbar province (search). The U.S. military called it a success.

In violence Tuesday, more than a dozen gunmen launched an assault on a Baghdad police station, wounding two policemen. A roadside bomb also killed a U.S. soldier on patrol in western Iraq.

"Foreign terrorists and hard-line Baathists want Iraq to descend into civil war. Foreign terrorists are using the Iraqi people as cannon fodder," said Khalilzad, who was confirmed by the Senate last week and was envoy to his native Afghanistan. He succeeds John Negroponte (search), now the national intelligence director.

"Hard-line Baathists who commit crimes against the Iraqi people are working to foster an all out civil war in the hope of either restoring dictatorship and their control of Iraq, or taking the country down with them. They will fail," Khalilzad said after his first meeting with President Jalal Talabani (search).

His comments followed a series of bomb attacks in Baghdad and northern Iraq on Sunday and Monday that killed dozens of people — many of them police.

Most of the attacks are thought to be the work of Islamic extremist groups like Abu Musab al-Zarqawi's (search) Al Qaeda in Iraq (search), or one of its affiliated organizations.

"I am horrified by the daily suffering of the Iraqi people. The terrorists attack ordinary people, teachers, doctors, newly trained police and others who are assisting the people of Iraq," Khalilzad added.

The meeting between Khalilzad and Talabani was held in the heavily fortified Green Zone — a swath of barricaded land in downtown Baghdad that houses the Iraqi government and the U.S. Embassy.

Tuesday's deadly attack on the U.S. patrol happened west of Rutbah, 220 miles west of Baghdad, the military said. The American soldier was evacuated to a hospital, where he was pronounced dead. It was the second time in two days that a soldier from 1st Corps Support Command was killed in a roadside bombing.

At least 1,722 members of the U.S. military have died since the beginning of the war in 2003, according to an Associated Press count.

About 15 gunmen in three cars opened fire at a police station in Baghdad's Aamil neighborhood and there was a 20-minute gunbattle, police 1st Lt. Thaar Mahmoud said.

Elsewhere, a roadside bomb exploded near a U.S. patrol north of Baqouba, causing no damage or injuries, police Col. Ali al-Timimi said. Baqouba is 35 miles northeast of Baghdad.

In a recorded message last month, the Jordanian-born al-Zarqawi purportedly gave his stamp of approval to the killing of fellow Muslims and civilians collaborating with the Shiite-led government and the United States. He also has said his aim was to start a civil war between the minority Sunni Arabs and the country's Shiite majority.

Sunni Arabs make up the core of the insurgency, and they have felt politically embittered by the rise of the Shiites and the Kurds — two communities that account for about 80 percent of the country's estimated 26 million people. Many Sunni Arabs boycotted January's historic elections.

Extremists in recent weeks have mostly targeted security forces at the forefront of government counterinsurgency operations — both to try to shatter their morale and prevent recruits from signing up.

"Iraq has become the center of global terrorism, and those groups' attacks are aiming to create a sectarian crisis," said Sabah Kadhim, an Interior Ministry spokesman. "Their main aim is to keep the country in chaos."

The number of attacks has escalated since Prime Minister Ibrahim al-Jaafari (search) announced his Shiite-led government on April 28. Nearly 1,200 people have been killed since then, according to an Associated Press count based on military, police and hospital reports.

Some extremists also have begun threatening fellow Sunni Arabs because some of the minority's leaders have expressed a readiness to join the political process.

Sunni Arabs earlier in the week finally submitted a list of 15 candidates for a Shiite-dominated committee drafting Iraq's constitution, but the committee did not accept it and asked that it first be endorsed by representatives of the entire community.

The snag could delay the constitutional process, further eroding the little time left for the charter to be drafted by mid-August.

"I will support the efforts of Iraqis to develop a unifying vision — a national compact for Iraq's future," Khalilzad said. "This vision should be enshrined in an enlightened and sound constitution that embraces democracy, pluralism and individual rights. The process must be inclusive. For Iraq to achieve its full potential no community or sector should be marginalized."

He added that the United States would continue to held Iraqis fight the insurgency.

"Operation Spear," which targeted the border city of Karabilah, 200 miles west of Baghdad and near the border with Syria, killed about 60 insurgents. One Marine also died.

"The operation was very successful because we cleaned out some insurgent weapons caches, we found evidence of lots of foreign fighter involvement, and we fully integrated with the Iraqi security forces," said Marine Lt. Col Tim Mundy, of Waynesville, N.C..

Meanwhile, Iraq's justice minister told AP in an interview Tuesday that Saddam's trial on war crimes charges will be over by the end of the year, underlining the government's determination to try the ousted leader soon.

Justice Minister Abdel Hussein Shandal, speaking on the sidelines of also accused U.S. officials of trying to delay efforts to interrogate Saddam.

"It seems there are lots of secrets they want to hide," he told AP in an interview in Belgium. There was no immediate comment from U.S. officials.

An official at the press office of the Iraqi Special Tribunal that is overseeing the court proceedings in Baghdad stressed it was an independent body and was not bound by the minister's comments. The official, who spoke on condition of anonymity because of security concerns, said no date had been set for Saddam's trial.

Shandal acknowledged no trial date has been set, but he was confident it would conclude by the end of 2005.

"This trial will be accomplished within 2005 — and this will only be in Iraqi courts," he said.