Jerusalem (CNN) -- Four people were killed and 55 injured about midnight Thursday when a gas canister exploded in a restaurant in Netanya, north of Tel Aviv, sources with Israeli ambulance services said.
The explosion was not the result of a terrorist attack, police said.
The top floor of the four-story storage building collapsed, CNN affiliate Channel 2 reported.
Police were searching the building to ensure that everyone had been accounted for. Some people were being evacuated with a crane, Minister of Police Yitzhak Aronovich said.
CNN's Waffa Munayyer, Izzy Lemberg and Anisha Bhandari contributed to this report.