The death toll from Tuesday's shooting at a Nevada IHOP continues to rise. A third National Guard member has died, bringing the number of casualties to five.

Authorities say a man with an AK-47 assault rifle shot 12 people, including seven National Guard members.  Five of them were in uniform.

Witnesses said the gunman, 32-year-old Eduardo Sencion, pulled up outside the Carson City IHOP in a blue minivan.

He shot a man on a motorcycle before walking inside the restaurant, where he fired several more rounds. After leaving the restaurant, he opened fire on people at a nearby strip mall.

Carson City Sheriff Kenny Furlong said the gunman also shot himself and was transported to the hospital, where he later died.

Carson City Sheriff Kenny Furlong said the gunman was transported to the hospital after shooting himself, where he later succumbed to his injuries.

Furlong cautioned against using the term "targeting" regarding Tuesday's shooting spree, saying Sencion's motives are still unclear.

"Folks this is a real tragic event and the word targeting would suggest we have the motive -- we don't have a motive yet," Furlong said.

"To say he was targeting before he came into the restaurant, those military persons, we have not been able to establish," he added.

Sencion had no prior criminal history or any known connection with the military or anyone inside the restaurant.