An early morning fire Thursday on the campus of Jackson State University has been ruled arson and two students are in police custody.

JSU spokesman Anthony Dean said the students lived in the dorm where the fire occurred, and both have been charged with arson, according to an article on www.clarionledger.com.

The names of the students have not been released.

About 630 students evacuated Alexander East Hall, a male dormitory, after the fire was reported around 3:45 a.m. Officials believe the fire may have started in a trash can inside the dorm on the fifth floor.

Students were allowed back in the dorm about 7 a.m. but were kept off the fifth floor. Dean said there was no water damage to the building and no injuries were reported.