Woman, Daughter Fatally Shot While Family Has Dinner : Crime: The mother was killed as she was breast-feeding her baby. Her husband says he thinks the gunman was a hired killer.

A gunman opened fire on a Long Beach family while they ate dinner, killing a woman breast-feeding her baby and fatally wounding the woman’s teen-age daughter, police said Wednesday.

The infant was not injured.

Police had no immediate motive for the murders, but they are investigating whether it was an act of revenge by a jealous husband, possibly stemming from a lovers’ triangle.

Ot Bonsynat watched in horror as a gunman opened fire through his living room window Tuesday night, killing his daughter, Nalon, 17, and wife, Thongsy Bonsynat, 41, in front of the couple’s three younger children, including the infant.

“I lost my mind,” said Bonsynat, who appeared shell-shocked Wednesday. “My daughter, she was trying to talk with me. But there was a lot of blood. I told her to just stay (calm). My wife, she dropped (instantly).”

Bonsynat told police that he was threatened last month by a man thinking Bonsynat was having an affair with the man’s wife.

Bonsynat also told police he believes the murderer, and two men with him, were hit men hired by the jealous husband. Homicide Detective Bill MacLyman said that Bonsynat’s theory “is a possibility.” Police had no suspects in custody but were looking for the man who Bonsynat said threatened him.

Bonsynat denied he had been having an affair, adding: “I never did anything. . . . I told him (last month), ‘I know you love your wife. I love my wife.’ ”

Bonsynat said three men came to the door of his apartment near Cherry Avenue and Anaheim Street, in the heart of the Long Beach Cambodian community, around 6 p.m. asking to speak with him.

Bonsynat opened the door a crack, then closed it. One of the men then broke the living room window and left.

About an hour later, the men returned and one began firing through the window, where the drapes were closed, police said.

Thongsy Bonsynat, the mother of six children, died of a single shot to the head. Nalon was pronounced dead at 9:20 p.m. Tuesday, two hours after she was taken to St. Mary Medical Center, according to police. The Lakewood High School junior was shot in the face, chest, arms and legs.

“I saw a guy come running down fast. He came halfway down the stairs and then he jumped off the rail,” said Lupe Martinez, a neighbor who was standing on his porch, across the street from the apartment building, at the time of the shooting. Martinez said he had seen three men going up to the apartment, but they ran in different directions after the shooting.

Bonsynat said he believes they are the same three men who appeared to be waiting for him earlier in the afternoon outside the medical clinic where he works as a translator. Because he was afraid, Bonsynat said, he waited for them to leave before heading to his car.

Members of the victim’s family were in shock Wednesday. Loni Kham, 27, a niece of the Bonsynats’ who lives two doors from them, said the family arrived from Cambodia more than a decade ago.

“I can’t believe this happened,” Kham said. “My God, we thought it would be safe in this country.”