Arrest made in arson at Florida mosque where gunman prayed

Emergency personnel are seen at the Islamic Center of Fort Pierce which was set on fire, in Fort Pierce, Florida

A Florida man who investigators say posted anti-Islamic material on social media was arrested on Wednesday on charges of setting fire to a mosque attended by the gunman who committed the deadliest mass shooting in modern U.S. history, police said.

The case is being prosecuted as a hate crime under Florida law, and the suspect, Joseph Michael Schreiber, 32, faces at least 30 years in prison if convicted of committing Monday's arson attack, according to the St. Lucie County Sheriff's Office.