COVINA, Calif., Jan. 26 (UPI) -- A Covina, Calif., woman was arrested and her two children hospitalized after the girls ate a marijuana-laced cookie, police said.

Covina police Lt. Tim Doonan said the 10- and 11-year-old children found a chocolate chip cookie in a plastic bag on their kitchen counter upon returning from junior high school Monday and split it between them, the San Gabriel Valley Tribune reported.

They starting feeling unwell and were taken to a nearby hospital about 7 p.m., the newspaper said Tuesday.

"(The children) said they had numbness in their bodies and their skin was pale and clammy," Doonan said. "Both girls were taken to the hospital where toxicology tests yielded they were under the influence of marijuana."

Child protective services were notified after the children's mother, Veronica Sylvester, 33, of Covina, was booked on suspicion of child endangerment, Doonan said.

Sylvester allegedly told detectives she obtained the cookie from a friend for medical purposes although she doesn't have a prescription for medical marijuana, the Tribune reported.