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PONCA CITY, Okla. – Two children were among five people killed in a plane crash near Ponca City.

Multiple agencies including the Kay County Sheriff’s Office, Oklahoma Highway Patrol and the Federal Aviation Administration responded to the area near Hubbard Rd. and S. U St. on Saturday around 10:40 a.m.

Henry Hercyk was mowing his lawn nearby when the plane flew over.

“Just a few seconds after that I heard the impact of the plane, or I heard a loud boom,” said Hercyk. “I stopped and looked around and I saw the fire and the black smoke coming from the east of us in the soybean field.”

He and a neighbor rushed to the scene.

“I didn`t see anyone that could have aid because the plane, by that time, was fully engulfed.”

Th plane was identified as a 2000 EXTRA EA-400 aircraft.

Officials say the plane, registered out of Kansas, was leaving the Ponca City Airport to travel north when it, for an unknown reason, lost altitude and hit the ground.

According to authorities, three adults and two children were killed in the crash.

The NTSB will arrive in Ponca City Sunday to investigate.

Names of the victims are being held until they are released by the medical examiner.

“Go home and hug your kids and if you have any unforgiveness in your heart, now`s the time to find forgiveness,” said Hercyk.

Crews are still investigating the crash and have not released other details at this time.