A former Naples resident was one of the Americans killed this week in a Black Hawk helicopter crash in southern Afghanistan, according to the soldier's family.

Thirty-one-year-old Staff Sergeant Marc Scialdo was one of five Americans killed in the Monday crash.

Scialdo's mother, Susan Scialdo, of Naples, said the family received the news Tuesday.

She said the family has not received additional information on the details of the crash.

"We just don't know anything else right now," she said.

Students at St. John Neumann Catholic School in Naples, where Scialdo graduated in 1999, honored him with a memorial service.

Monday night's crash brought the total number of U.S. troops killed that day to seven, making it the deadliest day for U.S. forces so far this year. Two U.S. special operations forces were gunned down hours earlier in an insider attack by an Afghan policeman in eastern Afghanistan.

The NATO military coalition said in a statement that initial reports showed no enemy activity in the area at the time. The cause of the crash is under investigation, the statement said.

A U.S. official said all five of the dead were American. The official said the helicopter went down outside Kandahar city.

All five people aboard the UH-60 Black Hawk were killed, said Maj. Adam Wojack, a spokesman for the international military coalition.

Scialdo's Facebook page listed him as a Black Hawk crew chief. He was living in Georgia.

He was a 1999 garduate of St. John Neumann High School and a 2002 graduate of Edison State College, according to his Facebook page.

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