TOPEKA, Kan. (AP) – A man accused of conspiring in a foiled plot to bomb a Kansas military base on behalf of the Islamic State group has pleaded guilty to conspiracy.

Alexander E. Blair changed his plea to guilty Monday in a Topeka federal court.

Prosecutors say Blair helped 21-year-old John T. Booker in his plot to plant a 1,000-pound bomb at the Fort Riley military base to aid the Islamic State group. Blair admitted in court that he loaned Booker $100 to secure a storage space for the explosives and failed to inform law enforcement of the plot.

A court document states that Blair decided to change his plea because he believed that the government had collected enough evidence to convict him.