Tenants were allowed back into their homes Tuesday night following an evacuation caused by a natural gas leak.

National Grid says the leak was detected along Freeman Street in Greenpoint early in the afternoon.

The block was completely closed off by emergency responders for hours as crews worked to detect where the leak was coming from.

A spokesperson from National Grid says about 150 customers were impacted and that crews are investigating to determine the origin of the leak. The spokesperson says they will make necessary repairs and restore service.

Officials have allowed tenants to return to the buildings, but some residents are still concerned.

The Red Cross says it does not expect to relocate any tenants.

There is no word yet on what caused the natural gas leak.