U.S. military officials say two separate shooting incidents in Iraq Thursday underscore how dangerous the country remains, more than a month after the fall of Saddam Hussein.

U.S. military officials say a member of the Army's Third Infantry Division was killed by a sniper in Baghdad Thursday, in circumstances which are not yet clear.

In a separate incident, reports from Baghdad say another American soldier who was manning a bridge was killed when an unidentified assailant walked up to him and opened fire at close range. The person then apparently fled.

There have been repeated demonstrations against the presence of U.S. forces in Iraq and in Washington, General Tommy Franks, the top commander of U.S. forces in the country, expects Iraq to remain a dangerous place.

"I have an expectation that we will see rough behavior in this country for the foreseeable future," he said. "We will be up to it and our people will continue to do their jobs."

In fact, the U.S. military issued an advisory Thursday telling prospective visitors to Iraq that while the country is stabilizing, coalition forces are not able to guarantee safe travel and advised against all but essential visits to the country.