ALBANY, N.Y.—An upstate New York man accused of trying to build an X-ray weapon to hurt and kill people at a mosque and an Islamic center faces additional weapons charges.

Federal prosecutors unsealed an indictment late Thursday against Glendon Scott Crawford, charging the 49-year-old man with conspiracy to use a weapon of mass destruction, distributing information related to such weapons and attempting to produce a device to endanger people by releasing radiation.

Crawford and Eric Feight have been jailed since their arrest in June on charges they assembled a mobile X-ray device meant to be used in the greater Albany area to sicken Muslims and enemies of Israel. Authorities say the device was inoperable. Nobody was hurt.

Crawford's attorney declined to comment Friday.

Feight wasn't named in the indictment.