A Kenyan man accused in a U.S. terrorism support case says jailhouse informants have been improperly used to gather information against him.

The attorney for Mohamed Said contends in a court motion that as many as five informants were used to gather incriminating evidence against him, obtain defense trial strategy and persuade Said to hire a different lawyer. The motion asks a judge to suppress any evidence from the informants.

Prosecutors had not responded Tuesday to the motion.

Said is scheduled to stand trial in June on eight terrorism-related charges involving alleged support for al-Qaida and terrorism groups in Africa and Syria. Said has pleaded not guilty.

The charges are based on chat room conversations Said allegedly had with undercover FBI operatives about financing terror groups and recruiting fighters.