New York (CNN) -- Police issued an "all clear" after an electronic greeting card prompted employees at a commercial Israeli bank in New York to call emergency personnel, according to Paul Browne, a New York City Police Department spokesman. Authorities said they initially X-rayed the package and were concerned that it was "a possible letter bomb," he said. The card contained interconnecting wires and batteries and drew a New York bomb squad to investigate. A law enforcement source told CNN that the letter was addressed to a bank employee. Multiple emergency vehicles and as many as 20 firefighters gathered around the building in Manhattan. Employees who left the building were not permitted re-enter it, according to CNN producer Kiran Khalid, but authorities did not evacuate the area. CNN's Allan Chernoff and Jeanne Meserve contributed to this report .
Card containing wires and batteries drew a bomb squad to investigate . It was received at an Israeli bank in Manhattan . Multiple emergency vehicles and up to 20 firefighters had gathered at the building .