Officials say there is no immediate threat at George Mason University after three students were arrested, one for possession of bomb-making materials and two for drug and alcohol-related charges.  

A search warrant indicates George Mason University Police raided a dorm room Wednesday evening, March 16, after a report of flames shooting out of the window. Officers found a green leafy substance, returned with a search warrant, and found “a tool box with match books, shaved match heads, a mortar and pedestal [sic], lighter fluid, hand sanitizer candles [sic], and a PVC pipe,” according to Fox5DC.com .  

The bomb squad told campus police those materials are used to manufacture fire bombs or other explosives, reported Fox 5.  

Some students on campus Tuesday said they did not know about the incident. Two students — who wished not to be identified — said they heard about the story through social media before they heard from the university. Others said there has been trouble in that dorm previously.  

The students involved in the arrests, and possible motives, were not identified.  

Eric Garcia contributed to this report.