A third National Guard member has died following the shooting rampage inside an IHOP restaurant in Carson City, Nev., authorities said late Tuesday. The death told now stands at five after Tuesday morning's shootings.

Carson City Sheriff Kenny Furlong said the third Guard member, a woman, died at an area hospital, The Associated Press reported.

The gunman, identified by authorities as Eduardo Sencion, 32, of Carson City, shot at least seven people outside an IHOP restaurant. The seven victims were taken to nearby hospitals by ambulance or helicopter, but their names and conditions hadn't been released as of Tuesday afternoon.

Sencion also took his own life. His motive was unclear, the Los Angeles Times reported. And interview's with his family suggest he was mentally unstable, though he had no criminal history, was not a member of the military and had no connection to the diners in the restaurant, according to Furlong.

The shooting occurred in a strip mall on U.S. 395, which is the main highway through Carson City, the capital of Nevada. A witness, Locals Barbecue owner Ralph Swagler, told the Reno Journal-Gazette that the gunman shot a motorcyclist with a rifle before entering the IHOP restaurant and continuing to shoot. Then he went back outside and fired into two other businesses in the strip mall: Locals Barbecue and an H&R Block branch.

Nevada has the fifth most gun deaths per capita in the U.S. The Legal Community Against Violence, a public interest law center that advocates for gun control, ranks it No. 18 out of the 50 states in enacting laws to prevent gun violence. However, Nevada doesn't require a background check to transfer a gun from one private party to another, limit the number of guns that can be bought at a time, have a waiting period for gun purchases, license gun owners, require owners to register their guns or prohibit assault weapons or large-capacity magazines.