A 2-day-old baby boy was kidnaped yesterday from the Johns Hopkins Hospital in Baltimore as his mother lay sleeping beside him, officials said.

Police said the child's mother, Patricia Nixon, took a nap at 11:30 a.m. with the baby in a bassinet at her bedside, and awoke an hour later to find the infant gone.

She was not alarmed, police said, because she had been told her son would be taken from the room for circumcision, but when a doctor came for the child about 45 minutes later, she realized he was missing.

Det. Kevin Davis of the city police homicide squad, which investigates kidnapings, said early this morning that the incident was being considered an abduction and that the FBI is assisting in the investigation.

"We've conducted a thorough search of the hospital and have not been able to come up with the baby so we're considering it an abduction," Davis said.

He said FBI agents had been "working with us" conducting interviews at the hospital, and that the search would continue "throughout the night."

Yesterday's abduction of Kendall B. Kernes came just a week after a 3-week-old Hyattsville boy who was being treated for pneumonia was taken from Prince George's Hospital Center while his parents were in the canteen. That child, Jeremiah Thate, was still missing early this morning, and a $15,700 reward has been offered.

A number of people called Baltimore police last night with information after sighting infants, Davis said, but those leads produced "nothing."

Nixon and Keith Kernes, Kendall's father, are also the parents of a 21-month-old boy, Davis said.

Davis, himself the father of young children, said the incident is "like your worst fear."