CARSON CITY, Nev. – A man with an AK-47 assault rifle shot an entire group of five uniformed National Guard members eating breakfast at a Nevada IHOP on Tuesday, killing two of them and another person in a hail of gunfire.

The suspect, 32-year-old Eduardo Sencion of Carson City, also shot himself and later died at a hospital. Seven people were wounded in the attack at a strip mall near a casino and department store in the state’s capital.

The gunman’s motive was unclear, but authorities are investigating whether the military members were targeted. The two guardsmen killed were men; another woman also was shot and killed.

Carson City Sheriff Kenny Furlong said Sencion entered the front doors of the IHOP and traveled “all the way through the restaurant to the back area” before opening fire.

“Obviously with five out of the 11 victims uniformed National Guardsmen, that has taken a priority interest in our investigation,” Furlong said.

Sencion worked at his family’s business in South Lake Tahoe, he was not in the military, and he had no known affiliations with anyone at the restaurant, Furlong said. He also had no criminal history.

Sencion’s family raised concerns about his mental health in interviews with investigators, Furlong said. He did not elaborate.

Sencion filed for bankruptcy protection in January 2009. His former lawyer in Carson City and Reno, Joe Laub, said he was surprised to learn Sencion was identified as the shooter.

He called the shooting an “aberration of his character.”

“He’s a gentle, kind man who was very helpful to friends and family,” Laub told The Associated Press. “I couldn’t venture to guess what would cause him to do something as horrible as this.”

The owner of a nearby barbecue restaurant described a frantic scene in which the gunman pulled up and immediately shot a man on a motorcycle, then charged into the IHOP, where the Guard members were meeting.

Ralph Swagler said he grabbed his own weapon, but said it was too late to stop the shooter.

“I wish I had shot at him but he was going in the IHOP,” said Swagler, who owns Locals BBQ & Grill. “But when he came at me, when somebody is pointing an automatic weapon at you — you can’t believe the firepower, the kind of rounds coming out of that weapon.”

Nevada officials first worried about the violence being more widespread. They locked down the state Capitol and Supreme Court buildings for about 40 minutes, and put extra security in place at state and military buildings in northern Nevada.

“At this point in time it appears to be isolated to this parking lot,” Furlong said.