A Hamas official said on Monday the Palestinian militant group would next release hostages on Sunday, a day later than expected under a complex ceasefire accord reached this month with Israel.

When Hamas’ military wing, the Qassam Brigades, released its propaganda video of three Israeli hostages being released Sunday night, there was a striking detail.

Romi Gonen, Emily Damari and Doron Steinbrecher were freed from Gaza. Thirty more hostages are set to be released in exchange for hundreds of Palestinian prisoners.