Mother of 4 Among Weekend Violence Victims : Crime: Seven people are fatally shot or stabbed. Authorities say much of the violence was gang-related.

At least seven people were killed in separate outbursts of weekend violence, including a Canoga Park woman hit by a stray bullet fired during a gang confrontation as she looked out her window, police said Saturday.

Virginia Mexia, a 33-year-old department store clerk and the mother of four, was shot in the face about 1:10 a.m. Saturday, police said. Authorities found Mexia dead on the floor of her second-floor apartment in the 8700 block of DeSoto Avenue, Los Angeles Police Sgt. Terry McBride said.

Mexia may have been looking out the window for her two teen-age daughters, who had gone to the movies, said her sister, Susan Valenzuela.

Another victim in the shooting, Paul Hoy Chou, 22, was in serious but stable condition at a hospital. Police said Chou was on the street when he was shot, but that it was unknown if he was involved in the gun battle between about 10 Latinos and three Asians.

Devonshire Division detectives arrested Stuardo Saenz, 20, of Canoga Park on Saturday afternoon and charged him with suspicion of murder. Authorities said they did not know what caused the gang incident but said they were looking for other suspects.

Many of the other incidents of weekend violence also were gang-related, police said.

Jaime Ray Lira, 19, was shot and killed about 2 a.m. Saturday in the Montecito Heights area, police said. Lira was driving near the intersection of Homer Street and Avenue 34, just east of the 110 Freeway, when he was shot several times, police said. He was found dead in his car after it crashed, police said.

Sgt. George Spitzer of the Police Department’s Hollenbeck Division said the slaying appeared gang-related but that authorities had no suspects and no witnesses.

At Tony’s Hofbrau bar on Valley Boulevard in El Sereno, Rene Tinajero, 30, was fatally stabbed about 1 a.m. Saturday during an argument with a man from a rival motorcycle gang, police said.

Lloyd Revels, 28, was talking to friends on a street in the unincorporated Florence area Friday night when three men confronted him and shot him “numerous times,” said Sgt. Larry Lincoln of the Los Angeles County Sheriff’s Department Information Bureau. Revels, who was not believed to be affiliated with a gang, was pronounced dead at Martin Luther King Jr./Drew Medical Center after the 10 p.m. shooting, he said.

A suspect was being questioned Saturday by Sheriff’s Department homicide investigators, Lincoln said.

A suspected gang member was killed Friday about 7 p.m. as he stood with several other people in a parking lot west of downtown Los Angeles. Police said the 21-year-old man, whose name was being withheld, was killed by gunfire from rival gang members in a passing pickup truck.

Authorities also were investigating the Friday night shooting death of a woman found at the Western Motel in the unincorporated Athens area, Lincoln said.

In another apparent gang slaying, a 21-year-old man was shot early Saturday in Eagle Rock and died a short time later at County-USC Medical Center, police said.

The man, whose name is being withheld, is at least the third victim of a sudden and unexplained outburst of violence in the last few days in the usually peaceful area between Hollywood and Pasadena, said Sgt. John Johnston of the Los Angeles Police Department’s Northeast Division.

Times staff writers Mayerene Barker and Grex Braxton contributed to this story.