HOUSTON -- A Rice University student has been reported missing, KPRC Local 2 reported.

University police said junior Matthew J. Wilson, 20, was last seen at his off-campus apartment at about noon Saturday.

"We found out from a student who Matthew was supposed to have picked up on Saturday evening and take to the airport that he never showed up" police Chief Bill Taylor said. "So we now have information that he had some things planned later from what we originally knew."

Wilson did not turn in any of his work for finals and his backpack is missing, officials said. Wilson's cellular phone was found inside his apartment, police said.

"It's the end of the school year," Taylor said. "He's a very serious student. He doesn't participate in high-risk behaviors. It was really out of place. This is a gentleman who takes his school work very, very serious."

Wilson was not known to drink or party.

"This is a very stable individual who just all of a sudden hasn't shown up," Taylor said. "It's a major concern. It's very out of character."

Investigators said Wilson's car is also missing. It is a silver Dodge Neon with Oklahoma license plate 863 MCZ.

Wilson's roommate said Wilson hardly used the car. He only drove it to go to a nearby Fiesta grocery store or Target on South Main Street.

Wilson is white, 5 feet 7 inches tall, 135 pounds and has red hair, a full beard, green eyes and wears glasses.

Anyone with information about Wilson is asked to call Rice police at 713-348-6000.