Four U.S. servicemen who were under Canadian command were killed in a roadside bombing, officials said Monday.

Meanwhile, a British soldier died in a separate attack while on foot patrol Sunday in Helmand province, the British Ministry of Defence said.

Lt.-Col. Todd Breasseale, a spokesman for the International Security Assistance Force, would only confirm that four ISAF soldiers "have died in an IED (strike)." But Breasseale did not provide further details, pending notification of relatives.

The four were the first U.S. soldiers to die in 2010.

The Canadian Press reported they were members of the 1st Battalion of the 12th Infantry Regiment based in Fort Carson, Colo., and were among the nearly 2,000 American soldiers under the command of Canadian Brig.-Gen. Daniel Ménard.

The deaths came less than a week after seven CIA employees were killed when a suicide bomber was able to get into a U.S. base in eastern Afghanistan.

The CIA workers were killed Wednesday, the same day that five Canadians died in a roadside bomb blast in Kandahar. The bodies of Sgt. George Miok, 28, Cpl. Zachery McCormack, 21, Sgt. Kirk Taylor, 28, Pte. Garrett Chidley, 21, and Calgary Herald reporter Michelle Lang, 34, arrived back in Canada on Sunday.

With files from The Associated Press