Iraqi police say an Iraqi woman who worked as a translator for the U.S. military has been shot dead in Mosul.

Police say gunmen open fire on the woman's car Tuesday as she was driving to the main U.S. military base in the northern Iraqi city.

The incident comes one day after a similar attack in Mosul on a vehicle carrying American civilians for a private volunteer relief organization. Three Americans were killed immediately in Monday's drive-by shooting and two others wounded. But, U.S. military officials say one of the wounded died overnight.

Meanwhile, a public opinion poll in Iraq conducted for Western news media indicates a majority of Iraqis believe life is better now than under Saddam Hussein. But slightly less than half of the respondents voiced approval of the U.S.-led invasion to oust the Iraqi leader.

The nationwide poll of more than 2,500 Iraqis, including the various ethnic and religious groups, was taken last month.

Results of the poll are being made public just days before the first anniversary of the coalition invasion.

Respondents were almost evenly divided (42% - 41%) on whether the invasion liberated, or humiliated Iraq, while slightly more than half said they were opposed to the continued presence of foreign forces.

Some information for this report provided by AP, AFP and Reuters.