SHIRLEY, N.Y. — Officials on Long Island say they’ll be conducting an investigation into a propane gas leak that forced the evacuation of 900 homes.

Joe Williams, commissioner of Suffolk County’s Fire, Rescue and Emergency Services Department says the county and the Town of Brookhaven will be looking at how the tank holding the propane was installed and if there were any defects.

The leak in the 30,000-gallon underground tank was fixed around 3 p.m. Saturday, about 14 hours after a propane delivery driver discovered it.

Stretches of the Sunrise Highway, Montauk Highway and some other major thoroughfares were closed in the area, and the Long Island Rail Road replaced trains with buses in the area for about 11 hou