Democratic lawmakers are planning to attend prayer services at a Washington-area mosque that has been accused of acting as a front for Hamas and that served as the home of terrorist spiritual leader Anwar al-Awlaki, who reportedly mentored two of the 9/11 hijackers.

On the heels of a deadly mass shooting by two Muslim individuals in San Bernardino, California, a group of Democratic lawmakers said they would attend Friday prayer services at the Dar al-Hijrah Mosque in Virginia, which has been linked to the financing of terrorists and where al-Awlaki served as the spiritual leader.

The Democrats set to attend include Reps. Don Beyer (D., Va.), Joseph Crowley (D., N.Y.), Betty McCollum (D., Minn.), Eleanor Holmes Norton (D., D.C.), and several Virginia state lawmakers, according to the New York Times.