KABUL (BNO NEWS) — Four soldiers, three Americans and one Briton, died in three separate incidents in southern Afghanistan on Sunday, officials said.

The NATO-led ISAF alliance said two American soldiers died in an improvised explosive device (IED) strike in southern Afghanistan, but provided no additional details. It also said a third American was killed in a second IED strike, also in the south.

Britain’s Ministry of Defence also announced a soldier from 3rd Battalion, The Rifles was killed in an explosion near Sangin, in Afghanistan’s Helmand province.

“This morning in Sangin an explosion caused the death of a British soldier from A Company 3 RIFLES,” said Lieutenant Colonel David Wakefield, a spokesman for the Task Force Helmand. “It happened in the ‘Green Zone’ area to the south of Sangin District Centre, an area where until recently insurgents had held sway.”

Wakefield said the soldier was on a foot patrol as part of operations that have brought security to the local population. “We have lost one of our comrades and we will remember him,” he said.

The casualties bring the number of soldiers killed in Afghanistan this year to 37, including 25 American soldiers and six British soldiers.

The identity of the British soldier will be announced on Monday by the country’s Ministry of Defence. It said his family has been informed.

The identities of the American soldiers will be announced by the U.S. Department of Defense not earlier than Monday.