An 18-year-old man was shot and killed and another man was injured in separate shootings, one involving an officer, late Saturday night on Tucson’s south side.

Around 10:15 p.m. a Tucson Police Department officer driving near South Park Avenue and East Irvington Road heard gunshots and began to investigate, Sgt. Maria Hawke, an agency spokeswoman said in a news release.

The officer was flagged down by several people in a gray 2004 Chevy Silverado near South Park Avenue and East Drexel Road, and was told one of the men in the truck was shot.

The man, 18-year-old Antonio Flores, was taken to the hospital where he was pronounced dead shortly after 11 p.m.

During the investigation, police closed the nearby roads and an officer positioned his car on South Park Avenue near East Drexel Road to prevent cars from driving south on Park Avenue.

The officer got into a confrontation with the occupants of a 2006 Ford Ranger that approached him and the driver of the truck quickly started to make a U-turn with the officer hanging from the passenger window, the release said.

The officer freed himself from the truck and fired his weapon several times at the vehicle.

The driver, 36-year-old Ramon Cedeno-Soto, was struck at least once. The officer was not injured.

The truck traveled north on Park Avenue and crashed into a wall near East Bantam Road.

Cedeno-Soto ran from the truck into a nearby mobile home occupied by a woman and her two children and refused to come out.

A passenger in the Ford Ranger stayed in the truck after the crash and was taken to the hospital for treatment of his injuries.

After about an hour, Cedeno-Soto came out of the home and was taken into custody.

The woman and children were not hurt.

Cedeno-Soto was taken to the hospital where he was treated for a gunshot wound and was released Sunday morning.

He was then booked into the Pima County jail on suspicion of one count of endangerment.

The earlier incident started when the occupants of the Chevy Silverado were parked in the Circle K parking lot, near South Campbell Avenue and East Drexel Road, and the occupants of another vehicle fired an unknown projectile at them.

One of the occupants of the Silverado was hit by the object but was not injured.

The driver of the truck began following the other vehicle to get its license plate information and when they caught up near East Drexel Road and South Copper Plate Avenue, several shots were fired from the other vehicle.

Flores was struck at least once.

The other vehicle drove away and was last seen traveling south on South Copper Plate Avenue.

The only information given about the vehicle is that it was dark colored.

Anyone with information about the shooting or the suspects is asked to call 911 or 88-CRIME (882-7463).