MINOT - Police are investigating a pair of bomb threats to a call center here.

Sgt. Leo Keelan said the Choice Hotels Reservation Center was closed down Saturday morning after an unknown caller said a bomb was in the building.

Keelan said the building was searched and no bomb was found.

Keelan said the same person called in another bomb threat on Sunday.

The building wasn't evacuated on the second threat, Keelan said.

The caller appears to be male, Keelan said. The caller has stayed on the line for more than 45 minutes while making the threats, Keelan said.

"We've got a lot of tape on him," Keelan said. "I think it may be a child playing games or someone who is mentally ill."