CHICAGO (CBS) — An overnight fire in the Back of the Yards neighborhood killed two people and hospitalized a third victim.

Investigators believe someone intentionally started the fire, CBS 2’s Sandra Torres reports.

The fire occurred in the 5400 block of South Laflin and was struck out about 2 a.m. Saturday morning.

Officials confirm they found two people dead in the fire, CBS 2’s Lauren Victory reports. Their identities were not disclosed. A third victim is in the hospital in critical condition.

The flames melted the siding of the two story home. The windows were broken and the interior was left charred.

“It was everywhere,” said witness, Rakeem James. “I don’t know if it got to the second house or not, but it was really everywhere. It was coming out the back, the top, and the windows. The flames were just everywhere.”

The Chicago Police Department’s Bomb and Arson Unit are investigating the fire. There is no details yet of what caused the fire.

Additional details were not immediately available.