Elgin, IL -Details of a house explosion that occurred Tuesday evening as a result of a natural gas leak on Elgin’s east side are beginning to emerge this morning.

The explosion, which happened at 8:30 p.m. at 708 Elma Ave., sent seven people to hospitals, authorities said this morning.

Elgin Battalion Chief Tim Michaels said five people from the house, one Nicor worker and a neighbor from across the street, were all hospitalized.

The household included an 8-year-old boy and a 30-year-old woman who were both taken to Provena St. Joseph Hospital in Elgin, a 30-year-old woman who was taken to St. Alexius Medical Center in Hoffman Estates, a 40-year-old man who was taken to Sherman Hospital in Elgin and sent transported to the burn unit at Loyola University Medical Center in Maywood and a 40-year-old woman who was taken to Sherman Hospital in Elgin.

As well, a 51-year-old Nicor worker who was investigating the leak, and a 25-year-old neighbor were both recovering at Provena St. Joseph Hospital, Michaels said.

The conditions of all of the patients was unknown this morning.

Nicor spokesman Richard Caragol said workers responded to a gas leak at 710 Elma Ave. at 5:41 p.m. and were working outside to investigate the cause when the house next door, at 708 Elma, exploded about 8:30 p.m.

The ranch house burned to the ground, and the fire threatened at least one other home that Elgin police said had also filled with gas. Police said neighboring homes and homes on adjacent streets were evacuated.

Residents were allowed to return to their homes about 11:15 p.m.

Firefighters were forced to let the house burn completely because they could not find the source of the leak, authorities said.