WICHITA, Kan. (AP) — A federal judge has refused to toss out terrorism-related charges against the man accused of plotting a suicide bomb attack at a Kansas airport.

U.S. District Judge Monti Belot rejected Friday all arguments made by defense attorneys for Terry Loewen. The former avionics technician was arrested in December 2013 after authorities said he tried to bring a van filled with inert explosives onto the tarmac at Mid-Continent Airport in Wichita.

The judge says defense claims of entrapment and outrageous government conduct cannot be determined before the trial. Loewen was arrested after a sting operation in which undercover FBI agents posed as co-conspirators and gave him the fake explosives.

Belot also refused to suppress evidence taken from the van due to a clerical error in the date of the search warrant.