CHICAGO (AP) — Prosecutors said Sunday they have charged two more people as part their investigation into activists who planned to take part in demonstrations at the two-day NATO summit.

The Cook County State's Attorney's office said Sebastian Senakiewicz, 24, of Chicago, is charged with falsely making a terrorist threat. Mark Neiweem, 28, who authorities believe to be from Chicago, is charged with attempted possession of explosives or incendiary devices.

The men were scheduled to make an initial court appearance later Sunday, when prosecutors were expected to offer more details about their allegations. Also expected in court Sunday is a third man, Taylor Hall, who was arrested during Saturday night protests and is charged with aggravated battery to a police officer. Authorities did not immediately release Hall's age or hometown.