Boy's big sleep after eating gran's pot cookies

A three-year-old boy slept for three days after accidentally eating his grandmother's cannabis cookies.

The boy ate the biscuits after finding them hidden in a garage refrigerator in Murrieta, California, reports the LA Times.

His grandmother has cancer and had a doctor's recommendation for marijuana to treat her pain and help her sleep.

Police Sgt. Phil Gomez said the boy's family called an ambulance when he didn't wake up after sleeping for more than 16 hours.

It wasn't until the child was at the hospital that the connection between the cookies and his long nap was made.

Sgt Gomez said the family members could face child endangerment charges, although he noted that the child seemed otherwise well cared for.

"It's unfortunate that they didn't take better steps to keep those cookies out of reach of the child," he said.

"The grandmother claims she's not going to make them ever again."