More than 80 American Muslim organizations are urging the U.S. Justice Department to launch an investigation into the Investigative Project on Terrorism, an organization that experts have identified as part of an effort to infiltrate and spy on the U.S. Muslim community. The Jan. 31 letter was sent to Attorney General Merrick Garland by the Council on American-Islamic Relations, the country's largest Muslim civil rights group. CAIR is conducting its own internal investigation over claims it was spied on by IPT, which The Washington Post reported is considered an anti-Muslim hate group.