When the Masjid Al-Kareem mosque in Providence, Rhode Island, received a threatening letter in November calling Muslims a "vile and filthy people," its members were frightened enough they asked for and got extra police protection.
The 42-year-old mosque was far from alone. The letter it received was one of 2,213 anti-Muslim bias incidents in the United States last year, according to a report released Tuesday by the Council on American-Islamic Relations.
The report found a 57 percent increase in the number of incidents in 2016, up from 1,409 in 2015. Incidents increased 5 percent from 2014 to 2015.