Investigators say Anthony Warner, the man accused of setting off a bomb Christmas Day in downtown Nashville killing himself and injuring others, sent materials about his views to people he knew.

FBI Special Agent Jason Pack says authorities are “aware Warner sent materials which espoused his viewpoints to several acquaintances throughout the country.”

Authorities have said 63 year-old Warner was responsible for the explosion, which damaged dozens of buildings and injured several people. Officials have not released a motive.

If you received material from Warner you are asked to contact the FBI at 800-CALL-FBI.