KABUL (AFP) - A bomb attack killed two NATO soldiers on Sunday in southern Afghanistan, a Taliban stronghold and the deadliest part of the country for Western troops locked in a nine-year war, the military said. The US-led International Security Assistance Force (ISAF) provided no further details and no longer releases the nationalities of troops when they are killed. The deaths come one day after four Italian soldiers were killed when a bomb blew up their vehicle in western Afghanistan. Sundays deaths took the number of foreign troops killed in 2010 to 574, according to a toll complied by AFP based on the independent Internet site icasualties.org. This year is already the deadliest so far in the conflict, which has killed more than 2,140 international soldiers since the 2001 US-led invasion to bring down the Taliban regime and replace it with a Western-backed administration.