The family of the missing Northwestern University pre-med student who was last seen early Saturday morning leaving an off-campus party announced a $25,000 reward for any information that would lead to the whereabouts of their son, reported.

The student, Harsha Maddula, 18, was wearing a gray sweater and dark gray pants. He is described as 5 feet, 4 inches tall and about 135 pounds

Maddual's cell phone showed that the closest  cell phone tower to the last signal received from his phone was near the school, the report said. The FBI had earlier  joined the search.

Maddula did not appear intoxicated to partygoers who spoke with him that night and left the party with three or four others.

His parents and uncle arrived in Evanston on Monday from their home on Long Island, N.Y., to help search for the pre-med engineering student. They say Maddula is diabetic and a straight-A student and that it would be out of character for him to simply disappear.

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Prasad Maddula said he believes someone kidnapped his son. He disappeared just three days after he returned to campus from Long Island, where his tight-knit family was helping him recover after he was recently diagnosed with diabetes

Northwestern's chief of police and vice president for student affairs met Tuesday morning with Maddula's parents, according to university spokesman Alan Cubbage.

University police met with the FBI Tuesday morning, the update said, and the statewide Terrorism and Intelligence Center has been notified, as well as the Cook County Department of Emergency Management.

University police have interviewed the students who were with Maddula at the party and in his residence hall, and searched the area near campus where he was last seen. In addition, university police reviewed closed-circuit TV tapes and electronic key data for the residence hall, but neither indicate he returned that night, the statement said.

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