A 73-year-old gunman entangled in a love triangle shot and killed the treasurer of a remote-controlled airplane club who police said was having an affair with the estranged wife of the attacker.

Before turning the gun on himself Tuesday, Robert Gully chased the woman from a parking lot into the lobby of a building where the club was meeting.

He fired multiple times but failed to hit her, Sacramento police Sgt. Andrew Pettit said.

Police said Gully and 62-year-old Jerome Votaw of Sacramento were both romantically involved with the 49-year-old woman, whose name was not released.

"I was shocked when I knew the suspect was in his 70s and the victim was in his 60s," Pettit said.

The woman was married to Gully, and both also were members of the club, but they were separated. Pettit did not know if she was living with Votaw.

"They were definitely in a relationship," he said. "As far as living together, I can't confirm that."

A person who answered the telephone at Votaw's home said the woman who lived there wasn't taking any calls.

Gully got into an argument with Votaw and the woman in the parking lot, drew a gun and shot Votaw multiple times before trying to shoot the woman, Pettit said. He kept firing as the woman ran to the lobby, with bullets shattering a large glass door.

"It appears that it wasn't random, it wasn't just something he came upon," Pettit said when asked if the shooting was spontaneous.

A security guard was in the lobby, and about a half-dozen airplane modelers club members were in a conference room and came into the lobby after the shooting took place.

Pettit credited the club's president with calming Gully down and walking him back outside the building.

"From what I understand, he did a fantastic job. He was in there taking a lead on this and directing people what to do in that situation," Pettit said.

Police, however, heard Gully shoot and kill himself as they arrived.

"It could have been a lot worse, especially with the people in there if he started shooting innocent bystanders," Pettit said. "We believe those two were his intended targets." Continued...