Three students at George Mason University in Virginia were arrested last week after police found bomb-making materials in a dorm room during a raid.

One of the students, who lived in the dorm room, was charged with possession of bomb-making materials while the other two were arrested on alcohol- and drug-related charges, according to court documents reviewed by The Associated Press.

Police went to the room Wednesday night after receiving a report of flames shooting out of the window.

Search warrants say police found a leafy green substance, matchbooks, shaved match heads, a mortar and pedestal, lighter fluid, hand sanitizer candles and a PVC pipe, according to AP.

Investigators reported the items could be used to make an explosive device. The students were not identified in the report and it was not clear whether they had any ties to or were inspired by terrorist organizations.

The arrests are the latest in a growing list of cases of radical activity in Northern Virginia. Last week, Mohamad Khweis, an Alexandria man who traveled to Syria to join the Islamic State, wwas captured by Kurdish peshmerga fighters.

In January, two men in Woodbridge were charged with terrorism-related offenses. One of the men attempted to join the Islamic State in Syria.

In July, 17-year-old Prince William County native Ali Shukri Amin pleaded guilty to “conspiring to provide material support to terrorists,” when he helped an Islamic State recruit and another teen go to Syria.

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