MIDDLETOWN TOWNSHIP, Pa. (CBS) - Authorities in are investigating a bomb threat made to a Bucks County Hospital Friday night.

Authorities say at about 6:40 p.m., St. Mary Medical Center in Middletown Township received a threatening call. Responding officers searched the facility but found no evidence of a bomb. The detonation time that was given has since passed, according to police.

Hospital officials reassured patients, workers and visitors of their safety and say patient care and hospital operations were unaffected.