Hate crimes against Muslims in the United States shot up 67 percent in 2015 to their highest levels since the aftermath of the September 11, 2001 attacks, according to new FBI statistics.

Overall, 57 percent of the 5,850 reported incidents were motivated by race or ethnicity, while 20 percent of hate crimes were related to religious bias, the federal law enforcement agency reported on Monday.

There were 257 incidents of anti-Muslim bias in 2015, compared to 154 the previous year. The number is second only to the surge in hate crimes following the 9/11 attacks in 2001 when 481 incidents against Muslims were reported.