A man who stormed a California medical office and shot the mother of his five children before turning the gun on himself left behind a suicide note filled with frustration over a property dispute, police said Wednesday.

Neng Moua, 43, and Zyang Vang, 33, had been in a contentious relationship for years before police say Moua, armed with a shotgun, went to the doctor's office where Vang worked.

Tuesday's shooting sent people running in fear from the office building in downtown Fresno, and in the end police found the bodies of Moua and Zang. Nobody else was physically harmed.

Investigators found the note later while searching Moua's home in nearby Clovis, said Fresno police Lt. Mark Salazar. Salazar said Moua wrote about Vang's desire to sell the home they owned together, but Moua didn't want to sell the home, where he lived until the time of the deadly shooting.

Court papers portray a rocky relationship. Vang had obtained a restraining order in 2004, saying Moua choked her causing bruises when she didn't return his affection. She said that he later threatened to shoot her, according to the restraining order filed in the Fresno County Superior Court.

Vang, who had a total of seven children, had worked for a decade at the medical office of Dr. New Sang, where she was killed. Vang's employer told The Fresno Bee in a statement that she was an "amazing mother, colleague and employee. She was loyal, warm and caring and always willing to help everyone."

The couple's children range in age from 12 to 21, and police have said they were all accounted for after the shooting.