LOS ANGELES (AP) _ A teen-ager was shot and killed on a sidewalk Monday, two youths were shot near an inner-city park and two others died in gang-related shootings during the holiday weekend, authorities said.

Antwon Hill, 17, was pronounced dead at St. Francis Medical Center after a gang-style drive-by shooting about noon Monday in suburban Lynwood, about 10 miles south of downtown Los Angeles.

Hill and a friend were standing on the sidewalk when a car slowed and one of two occupants opened fire, said Los Angeles County sheriff's Deputy Eric Smith.

Later Monday, Independence Day revelers gathered at a city swimming pool watched in horror as a carload of youths screaming gang slogans roared through an alley bordering the pool, shooting two youths as they went.

A bullet passed through the neck of one victim and the hip of another, said police Officer Tammy Havlovic. Both youths, whose names weren't available, were in stable condition at Martin Luther King-Drew Medical Center, she said.

Santa Ana police Sgt. Collie Provence said Aburto Olympo, 18, and passenger, Martin Ambriez, 23, were seated in Olympo's car Sunday night when they got in an argument with a group of men standing in Centennial Park, Provence said. The men drew guns and fired numerous shots, striking Olympo in the head and Ambriez in the lower torso, police said.

Olympo died nearly four hours later at Fountain Valley Regional Hospital and Medical Center and Ambriez was in stable condition, said a nursing supervisor.

Two bystanders were also wounded by the barrage of gunfire, Provence said. Both suffered minor wounds to their arms and backs, he said.

No arrests were made.

Earlier Sunday in Los Angeles, 31-year-old Melvin Turner was shot from a passing car as he walked home. Detective Paul Mize said he died at Daniel Freeman Memorial Hospital.

While Turner was not a known gang member, the drive-by shooting was typical of street gangs, he said.

Police had made no arrests and no motive had been determined.