Police evacuated residents of several blocks and and closed roads in the perimeter around Congregation Beth-El at 249 Arch St. in the city following an emailed bomb threat.
No bomb was found following a search of the synagogue.
The incident drew police from several area departments and state police. Fire police detoured traffic around the incident.
Shelter was provided at the Shikellamy High School auditorium, according to 911 dispatch reports.