"We're erring on the side of caution," said Charleen Taylor, a WSU spokeswoman.Many of the students have been sleeping on mattresses at the Student Recreation Center on campus, Taylor said.Students will be allowed to re-enter the dorms on Tuesday morning, she said.On Sunday, three dog units and investigators from the State Patrol, Bureau of Alcohol, Tobacco and Firearms and municipal police searched the complex but found no trace of explosives.Details of how and when the threat was received have not been released by campus police, Taylor said, adding the threat was not related to international terrorism.The dormitories, both six stories tall, were evacuated at 10 a.m. Sunday, as were administrative offices in the complex.Most of the 412 students who live in the two dorms are sophomores and freshmen, officials said.

Charlene Taylor of the WSU News Bureau said more than 800 students are expected to attend Future Cougar Day this year.Students will meet at Beasley Coliseum at 10 a.m. for activites.Faculty and students from WSU's academic programs will be at the fair to answer any questions.