CHICAGO (CBS)– Three people were killed when a small plane crashed on I-55 in Lincoln, Illinois Tuesday morning.

According to Illinois State Police, the plane became fully engulfed upon impact in the middle of the interstate just before 9 a.m.

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As emergency crews respond to the crash, I-55 soutbound lanes are closed for an “extended period of time” and could remain closed for up to five hours.

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Officials said traffic is being diverted at milepost 126.

ISP reported the plane had only three occupants.

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This is a developing story.