WEST, Texas -

A volunteer with the West Fire Department was arrested early Friday morning and charged with possession of an explosive device, federal sources told Houston's KPRC-TV.

Bryce Ashley Reed was arrested after federal investigators received a call from the McLennan County Sheriff's Office, sources said.

According to sources, Reed asked an acquaintance to store a box for him sometime after the April 19 explosion at the West Fertilizer Company. Sources said that person decided to look in the box and discovered what appeared to be a pipe bomb.

Sources said that person then called the Sheriff's Office, who called federal investigators.

So far, investigators said they have found no connection between this discovery and the explosion. Reed is due to be arraigned Friday morning on federal charges.

On Friday, Texas law enforcement officials launched a criminal investigation into last month's deadly fertilizer plant explosion.