By Janet DiGiacomo and Dana Ford
(CNN) -- At least two people on board a small plane were killed when it crashed into homes in South Bend, Indiana, authorities said.
The private jet hit two homes and possibly damaged a third, said Capt. Phillip Trent with the South Bend Police Department.
The plane was carrying four people when it crashed.
The other two people on board were injured, as was one person on the ground, said Assistant Fire Chief John Corthier.
Nearby houses were evacuated because of a subsequent gas leak, CNN affiliate WNDU reported. Video from the affiliate showed emergency personnel on scene. The plane was still stuck in what looked to be a one-story home.
Among those injured, two are in fair condition and one is in serious condition, according to Maggie Scroope, spokeswoman at Memorial Hospital of South Bend, where the injured are being treated.
The plane's pilot radioed for help after experiencing problems with the technical equipment, WNDU reported, adding that a landing attempt failed.
The plane departed from Tulsa, Oklahoma, and was inbound to South Bend Regional Airport, WNDU said.
The affiliate reported that the National Transportation Safety Board is expected to arrive Sunday night to investigate the crash.