HAWTHORNE, Nev. (AP) — Seven Marines are dead and eight were taken to a Reno hospital after a mortar exploded during a training accident at a rural Nevada Army depot.

Spokesman Mark Earnest of Renown Regional Medical Center says one person has been discharged Tuesday, while five are in serious condition, one is in fair, and one patient has died.

Earlier reports indicated nine people were taken to the hospital, although Earnest wasn't clear how the initial inaccuracy happened.

Marine Corps officials say the accident happened about 10 p.m. Monday when a 60mm mortar exploded at the Hawthorne Army Depot. The Marines were from the 2nd Marine Expeditionary Force based at Camp Lejeune, N.C.

The identities of those killed won't be released until 24 hours after their families are notified.