As the 20th anniversary of 9/11 passed Saturday, Muslim Americans braced for what community leaders said happens every year around this time: a wave of hate and overt Islamophobia.

Passersby outside the Islamic Center of Greater Austin in Texas discovered a bloodied mask of a pig’s head and a sign planted in the ground reading, “You are as unclean to God as a pig is to you.” The Austin Police Department’s hate crimes review committee is looking into the vandalism, but it needs more evidence for it to be considered a hate crime, according to local news station KVUE-ABC.