A small airplane crashed on a highway northwest of Houston and caught fire on Sunday morning, according to Texas Department of Public Safety officials. 

No injuries were immediately reported, and it's unclear how many passengers were on the plane.

Texas plane crash

Video taken by a passing motorist showed smoke billowing out of the plane's cockpit. (Fox 26 Houston)

The plane crashed around 11:30 a.m. in the northbound lanes of SH-99 in northwest Harris County.

MEDICAL TRANSPORT PLANE CRASHES OFF HAWAII COAST, COAST GUARD SEARCH UNDERWAY

Video obtained by Fox 26 Houston appears to show smoke billowing out of the cockpit and one of the wings on fire.

Plane crash

Texas Department of Public Safety officials blocked off the northbound lanes on SH-99 while investigating the crash. (Texas Department of Public Safety)

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The plane is a five-seater, single-engine aircraft manufactured in 1960, according to flight tracker FlightAware.