A husband and wife severely injured after their mobile home in Clinton exploded have died, according to Clinton police.

The explosion happened at a mobile home park on Balsam Place in Clinton Thursday and residents in towns miles away heard it.

Police started to receive several calls about a loud explosion around 12:30 a.m. and officers started trying to locate the source. A couple minutes later, police received a call that there was a fire at the Evergreen Park Complex.

They found 64-year-old Leo Hinkley and his 61-year-old wife, Candace Hinkley, surrounded by fire and pulled them from the burning wreckage.

Lifestar responded and flew the Hinkleys to Bridgeport Hospital. On Friday police announced that Leo Hinkley had died. His wife Candace Hinkley died Saturday.

Multiple responders assisted the Clinton Volunteer Fire Department, including Old Saybrook, Madison and Killingworth. The Clinton Volunteer Fire Department extinguished the fire, secured the debris field and inspected the surrounding structures.

The fire marshal is still investigating the exact cause of the explosion, but the preliminary results indicate that the explosion most likely did not result from equipment or mechanical malfunctions.

Police said it will take some time to determine the cause due to the extensive damage and the size and scope of the debris field.

Authorities encourage anyone with concerns over their own propane tanks or appliances to call 911 immediately.

Residents of four mobile homes are displaced.