CNN  — 

A man accused of kidnapping a woman and holding her in a cinder block “dungeon” in his Oregon home has pleaded not guilty to charges of kidnapping and transportation with intent to engage in sexual activity, court documents show.

Negasi Zuberi, 29, was ordered during a hearing Monday to remain in custody until his trial, which is scheduled for October 17, the documents show.

Zuberi was taken into federal custody after a woman escaped from his Klamath Falls home last month, according to a news release from the FBI field office in Portland. The woman was kidnapped from Seattle and sexually assaulted before being placed in a “makeshift cell” in Zuberi’s garage, investigators said.

Following Zuberi’s arrest, the FBI said it was looking for additional victims in other states.

Zuberi has lived in at least 10 states since 2016 and has been linked to violent assaults in at least four, according to the FBI. Investigators have reason to believe there could be several other victims, the agency said.

Zuberi was indicted by a federal grand jury in Oregon, court documents filed earlier this month show.

Zuberi’s attorney, Heather Fraley, told CNN at the time of the indictment that she had no comment.