Two troops with the U.S.-led international military coalition and three Afghan men died Monday in violence in southern Afghanistan, local and NATO officials said.

The Afghan men died when their car hit a roadside bomb in Spin Boldak district of Kandahar province, said provincial police chief Gen. Abdul Razaq.

The coalition said the two service members were killed in an insurgent attack in the south where Afghan and international troops are trying to retain control of territory they seized during the past two years.

The coalition did not disclose any more details about the deaths.

So far this year, 237 international service members have been killed in Afghanistan, including at least 168 Americans.

On Sunday, three Afghan women died when the tractor they were riding hit a roadside bomb in Khakrez district of Kandahar province, said district police chief Gul Jan.