TULSA - Federal investigators are still sifting through a "significant" amount of explosives and bomb-making material taken from a south Tulsa apartment.
Tulsa bomb technicians and federal investigators spent hours Wednesday night searching the residence.
Police were called to the Greens of Bedford apartments, a complex bordering Broken Arrow near 61st and Garnett, for a domestic disturbance with a pipe.
When police arrived, they saw what appeared to be grenades in plain sight. A loaded rifle was also found.
"For this area and for the type of call it was, it was a very significant recovery of explosive material," said Second Chief Paul Vanderplow with the Bureau of Alcohol, Tobacco, Firearms and Explosives.
Richard Douglas Carter, 41, was arrested on complaints of manufacturing explosives and possession of a firearm in commission of a felony, according to jail records.
"We just don't have a working theory right now as to what his ultimate motive was," said Vanderplow.
According to the booking report, Carter told police he knew what he was doing was illegal and the explosives and materials were going to be used for illegal purposes.
Court documents show that he served a year in prison in 1997 for domestic assault and battery.
Vanderplow believes charges should be filed early next week.