KABUL (Reuters) - A member of the NATO-led force in Afghanistan was killed on Sunday, taking the total number of foreign troops killed in 2010 to 700, by far the deadliest year of the war since the Taliban were toppled in 2001 .

The NATO-led International Security Assistance Force (ISAF) said one service member was killed by a roadside bomb in southern Afghanistan. It gave no other details, including the nationality of those killed.

A total of 521 foreign troops were killed in 2009, previously the worst year of the war, but operations against the Taliban-led insurgency have increased dramatically over the past 18 months. About 2,270 foreign troops have been killed since the war began, roughly two-thirds of them Americans.