Officials had previously offered a $15,000 reward for the arrest of those responsible for the fires.
An armed robbery two weeks ago represents a growing problem for CSS.
Police have arrested two suspects and are seeking a third.
The fire comes after five arsons were reported last month.
Cell phones, cash among items stolen from the students.
Two students were assaulted on the 1500 block of Oxford Street on Feb. 25.
Temple has not included state-mandated arrest information in its daily crime reports.
The ATF and L.F. Driscoll Company are offering a $15,000 reward.
The ATF and L.F. Driscoll Company are offering a combined reward of up to $15,000.
The five fires occurred on Monday and Tuesday and involved construction debris, officials said.