JONESBORO, Ark. >> A gunman shot six people at an Arkansas home Saturday, killing a man and a teenager and critically wounding two boys, before fatally shooting a worker at a nearby business, police said. 

The suspected gunman was later found dead of a gunshot wound in the driver’s seat of a stopped car, Jonesboro police Sgt. Doug Formon said at an evening news conference. It was not immediately clear if the gunshot was self-inflicted.

Formon said a man and a 13-year-old girl were killed Saturday afternoon inside the home in east Jonesboro, Arkansas, where it appeared a family was having a party or gathering.

Four other people were injured and were taken to hospitals in Memphis, Tennessee. Formon said the children, ages 8 and 10, were transported in critical condition.

Police received a 911 call about the shooting at the home around 1:00 p.m. Police responded at 1:22 p.m. to a report of a second shooting at a business near a U.S. highway. Forman said the worker was found shot to death at the second site, where construction and lawn work had been ongoing.

Around 3:30 p.m., Formon said, a farmer or passing motorist called 911 to report a car parked in the middle of a county road. A deputy responded and found the stopped car with the suspected gunman inside.

Forman said that police did not know of a motive as of Saturday evening and that the investigation is ongoing.

He declined to identify the victims or the suspect, saying officials wanted to be sure all family members had been notified. He said it was not known if the suspect and victims were related.