Police in Massachusetts said a man posing as a valet stole a car from a woman in labor after she arrived at the emergency room.

Lowell police said the woman drove herself to Lowell General Hospital at about 3 a.m. Friday and a man wearing what appeared to be a uniform shirt approached her, identified himself as the hospital's valet and offered to park her car, the Boston Herald reported Monday.

"During the admission process, she was told they don't have a valet there," police Capt. Kelly Richardson said.

Richardson said the car was found abandoned Saturday and officers were searching for fingerprints or other evidence.

Police described the suspect as a heavy-set white man with dark hair.