CHICAGO – A grand jury has handed down an 11-count indictment against three NATO-summit protesters jailed since May, including four terrorism-related counts and half a dozen new charges, according to the document obtained by The Associated Press from defense attorneys.

Tacking on more charges to three original charges could give prosecutors more leverage in negotiating a plea deal later or in boosting their chances of securing at least some convictions if the case does eventually go to trial, some legal experts said Wednesday.

Brian Church, Jared Chase and Brent Vincent Betterly were arrested days before the summit in Chicago under Illinois’ never-before-used anti-terrorism statutes, prosecutors accusing them of plotting to attack President Barack Obama’s campaign headquarters with Molotov cocktails.