The North Las Vegas Police Department is investigating an earlier incident involving injury at the home of the foster family caring for Everlyse Cabrera, the 2 1/2-year-old girl who went missing June 10.

Police on Friday would not comment in depth about the incident but said it took place four or five months ago and involved another foster child in the care of Manuel and Vilma Carrascal. Everlyse had been in the family's care two months before her disappearance.

"We are conducting an investigation into a prior incident with the foster family in the same home," said Tim Bedwell, spokesman for North Las Vegas police.

Police also announced that two private companies are offering a combined $15,000 reward in connection with Everlyse's disappearance.

Everlyse went missing from the Carrascals' home in the 6500 block of Diamond Point Court, near Centennial Parkway and Clayton Street in North Las Vegas. The foster parents initially told police that Everlyse used a stool to climb up and unlock a deadbolt on the front door and then left the home.

North Las Vegas Police Detective Dave Molnar said the police learned about the earlier injury incident Wednesday and have been looking into it since. He described it as "possible child abuse at the foster home."

The police also said that the foster family was not cooperating with the authorities on the investigation into the earlier injury.

The foster family has been mostly silent in the week since Everlyse went missing. Police said the family stopped cooperating with the investigation into Everlyse's disappearance. Neighbors living around Diamond Point Court have criticized the foster family for remaining silent.

Police didn't say how they learned about the earlier injury involving another foster child, but Bedwell said no government agency, including the Clark County Department of Family Services, reported the injury to the police.

"It was not reported by anyone," he said.

Clark County officials on Thursday confirmed that a foster child was injured in Carrascals' home but the injury was "deemed unintentional." The child was not removed from the home because of any injury, county officials said.

County spokeswoman Gina Olivares on Friday said state law prohibits the county from discussing the case in detail. But she said that serious cases of abuse are always referred to the police.

"From a process standpoint, when a report of serious abuse or neglect is confirmed, the police department is contacted by child protective services," she said.

The police, meanwhile, said that two companies offered rewards for information on Everlyse. Meadow Dairy Gold of Las Vegas offered a $10,000 reward and the Carole Sund/Carrington Foundation is offering a $5,000 reward for Everlyse's safe return.

Barry Beaman, general manager of Meadow Dairy Gold, said that the $10,000 reward would still be offered even if Everlyse is not found alive.

"We'd love to see her returned to the family," he said. "God forbid there is foul play, the money goes to anyone with information that leads to the arrest and successful conviction" of the culprit.

Bedwell said that the police were searching for information on Everlyse's whereabouts since May 15, the last day that someone outside the foster family is known to have seen her. Everlyse was reportedly wearing a pink T-shirt, pink shorts and no shoes when she was last seen on June 10. The foster mother told authorities that she discovered the girl missing at about 8 a.m. The family didn't report the girl missing for four hours, police said.

The foster parents live with their two sons, one 34 and the other 14. Everlyse's 11-month-old brother, who was also living at the foster home, was removed by child welfare officials after she disappeared.