PHOENIX (AP) — A man charged with detonating a homemade explosive device outside a Social Security Administration office in Arizona had researched how to construct a particular explosive that authorities say has been used in terrorist bomb plots, according to a criminal complaint.

Abdullatif Ali Aldosary, 47, was charged in federal court with maliciously damaging federal property by means of explosives and being a felon in possession of a firearm. He appeared in a Phoenix courtroom Monday but didn’t enter a plea. He is set to appear again on Wednesday.