U.S.-led coalition forces in Afghanistan say a roadside bomb hit a security patrol in the country's south, killing one soldier and wounding two others.

A coalition statement said the troops were on patrol with Afghan forces Tuesday when a mine exploded and hit their vehicle along the Helmand River. There were no further details of the nationalities of the victims.

The statement also said other soldiers in the patrol discovered and neutralized two additional improvised explosive devices in the area.

Afghan authorities said five Afghan civilians were killed and another one wounded late Monday when a roadside blast struck a vehicle in Helmand province.

In neighboring Kandahar province, a roadside bomb hit a police patrol, killing two Afghan policemen and wounding three others.

Police have blamed that attack on the Taliban.

Some information for this report was provided by AFP and  AP.