The suspect is a Muslim who's accused of opening fire on fellow soldiers in a rampage that left 13 people dead and dozens injured.

The Islamic Society of Northwest Suburbs of Chicago has sent e-mails asking Muslims to be more careful, especially on Friday, the day Muslims hold communal prayers.

The Mosque Foundation president in Bridgeview says he's called police to put them on high alert. Zaher Sahloul says he fears something could be done to Muslims because of "misguided anger."

The Council of Islamic Organizations of Greater Chicago has instructed imams to address Thursday's shooting and talk generally about violence in America.