Hamas has said that 33 hostages in Gaza have been killed during the almost 14-month-old conflict between the group and Israel in the enclave, without giving their nationalities, Reuters reports.

Hamas added that other hostages had gone missing.

“With the continuation of your crazy war,” it said in a statement addressed to Israel, “you could lose your hostages forever. Do what you have to do before it is too late.”

Hamas shortly afterwards published a video that detailed when and how the hostages were killed, blaming Israeli Prime Minister Benjamin Netanyahu for their fate.