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US identifies contractors killed in Afghanistan

The US Department of Homeland Security Tuesday identified three foreign civilian contractors killed in Afghanistan Sunday as two Americans and a Briton.

Afghan policemen perform a drill during a graduation ceremony at the Adraskan police training centre in Herat province in May 2012. The US Department of Homeland Security Tuesday identified three foreign civilian contractors killed in Afghanistan Sunday as two Americans and a Briton.

The victims were Benjamin Monsivais, a former US Border Patrol and retired Immigration and Customs Enforcement agent; Joseph Perez, a retired US Customs and Border Protection port director; and retired British customs officer David Chamberlain, DHS said in a statement.

"It is with great sadness that I learned this weekend of the fatal shooting of three contractors stationed at the Herat Training Center in Herat, Afghanistan," US Secretary of Homeland Security Janet Napolitano said in the statement.

"Their tragic deaths remind us of the dangers facing our men and women overseas, and the many sacrifices they make on our behalf every day."

NATO and Afghan officials said Sunday that the three, who were working for NATO as trainers, were killed when a man in an Afghan security force uniform turned his weapon against them.

The Department of Homeland Security said Tuesday two other people were wounded in the attack, identifying them as former US Border Patrol agent Dana Hampton and language assistant Aimal Formully.

The number of so-called green-on-blue attacks -- in which members of Afghan security forces attack their Western allies -- has sharply increased this year.

Although Taliban insurgents claim some of the attacks, many are believed to be the result of cultural differences and antagonisms between Afghan soldiers and their Western counterparts.