Assailants with hand grenades killed a U.S. soldier and wounded three in central Baghdad (search) early Thursday, the military said.

The name of the slain soldier was withheld pending notification of next of kin.

A total of 790 U.S. service members have died since the beginning of military operations in Iraq last year. Of those, 576 died as a result of hostile action and 214 died of non-hostile causes.