Hamas said Saturday it will only release an American-Israeli and the bodies of four other hostages if Israel implements their ceasefire agreement, calling it an “exceptional deal” aimed at getting the truce back on track.

Hamas says it has accepted a proposal from mediators to release one living American-Israeli hostage and the bodies of four dual-nationals, hostages who had died in captivity.

The offer to release the American hostage appears to be an effort to pressure Israel into starting discussions over a second phase to the ceasefire in Gaza.