LONG BEACH  (AP) — Los Angeles County supervisors offered a $25,000 reward Tuesday to help catch an attacker who shot and wounded three members of a family and kidnapped a 3-week-old girl who was later found dead in a trash bin near the Mexican border.

The award for information leading to a capture and conviction comes a day after police said they had no leads and no motive for the Saturday attack in Long Beach that wounded the parents and uncle of Eliza Delacruz.

On Sunday, a transient found the body of the 10-pound girl in a plastic bag stuffed in a dumpster behind an Imperial Beach strip mall, 120 miles from the girl’s home.

Detectives had only a vague description of a man who may be black or Hispanic and were trying to discover whether surveillance cameras in Imperial Beach may have captured any images.

The time and cause of the girl’s death had not been determined.

The girl’s father was released from the hospital but her mother and uncle remained in critical condition.

At a Monday news conference, Police Chief Robert Luna said the lack of direction in the investigation was frustrating.

“Somebody had to have seen or heard something,” he said.

The baby’s parents and uncle have spoken with police, but it was too early to know if the family was withholding clues, Luna said.

Detectives do not believe the crime was a random act, and the FBI is assisting in the investigation, Luna said.

The chief said nothing is being ruled out at this point, including that the gunman has fled to Mexico, or that family members or a drug cartel are involved.

In Imperial Beach, mourners erected a makeshift memorial of candles and flowers outside a pizza shop at the mall.

Aaron Cruz, who lives next door to the victims’ two-story stucco house, said the baby’s father is a veterinary technician who worked six days a week and was thrilled to be a dad.

Cruz, who described himself as the man’s best friend, said the family often hosted large barbecues on their front lawn after moving in a few years ago.

The baby’s parents and uncle lived there with another uncle and the baby’s grandparents, but no one else was there when the shooting happened, Cruz said.