PHILADELPHIA (AP/WTXF) -- Federal authorities have announced a $20,000 reward for information leading to the arrest of a Pennsylvania man accused of having threatened President Donald Trump and other officials.

Twenty-seven-year-old Shawn Christy of McAdoo is also wanted in Pennsylvania on arrest warrants for burglary, probation violation and failure to appear for an aggravated assault case.

Officials say Christy has threatened to use "full lethal force on any law enforcement officer that tries to detain me." A federal warrant was issued June 19 for Christy in relation to Facebook threats against Northampton County's district attorney.

The U.S. Marshals service, the FBI, and the U.S. Secret Service are asking for help for the public but warn that Christy should be considered armed and dangerous.