The sailor who was shot Thursday at a military support center in Chattanooga, Tenn., has died, bringing the death toll from the attack to five.

The 24-year-old sailor, who leaves behind a wife and three young sons, was one of three people injured at the center during the shooting, which killed four Marines, the Navy said Saturday morning.

Fox News confirmed the sailor's identity as Petty Officer 2nd Class Randall Smith, a reservist on active duty in Chattanooga.

The Ohio native suffered three gunshot wounds in the attack on the Navy Operation Support Center, and underwent several surgeries after doctors tried to save him. He died at roughly 2:17 a.m. Saturday.

The FBI is investigating the case as an act of domestic terrorism.

U.S. authorities accuse Muhammad Youssef Abdulazeez, 24 of Hixson, Tenn., of making two deadly attempts to kill military service members and recruits Thursday, first at a recruiting center in Chattanooga, then several miles away at the Navy and Marine reserve center, where he shot and killed the four marines and the sailor.

Abdulazeez was killed by police.

The Associated Press contributed to this report.