Kabul - A US-led coalition soldier was killed in a roadside explosion in western Afghanistan, while international forces killed four suspected Taliban militants in the south, the military said Friday.

The soldier was killed when the convoy he was traveling with struck a roadside bomb on Friday morning, the US military said in a statement.

The military did not disclose the name and nationality of the dead soldier or the exact location of the incident. Most coalition soldiers are from the United States.

In another incident, Afghan and coalition forces killed four suspected Taliban militants as they were planting a roadside bomb in the Nahr-e-Surkh district in the volatile southern province of Helmand.

"Once the militants were positively identified, the combined forces engaged the militants with indirect fire, killing all four," US military statement said.

Roadside and suicide attacks have become common tactics for the Taliban militants, who have waged a bloody war to topple the Western-backed Afghan government and expel some 70,000 international troops from the country. (dpa)