The indictment says Vincent Lang maliciously attempted to damage and destroy the center by fire, and that he did it because it was a mosque.
"I just couldn't believe what happened," said Ahmad Ibrahim who is a member of Masjid Al-Jamia. "It's absolutely disgusting, whoever did this."
Faith leaders and politicians from around Montgomery County came to the center to stand in solidarity with the Muslim community.
CAIR Philadelphia is now calling for stepped-up security at the Montgomery County center.
Police have released a photo of a person of interest being sought after a man was fatally shot during a carjacking outside a mosque in Upper Darby, Pennsylvania.
The president of the center says they have filed a police report and also reached out to the Council on American-Islamic Relations.