The Israeli army dropped aerial announcements over Gaza with a call for a "reward for information about prisoners".
The announcements, which called on Israelis and other nationalities to provide information about prisoners, included phone numbers and QR codes.
The announcement, which was also shared on the Israeli army's social media account, said, "If you want a better future for your children and yourself, do a favor. Provide accurate and useful information about prisoners in your area. The Israeli army will make every effort to ensure your safety and the well-being of your home. It will also provide you with a monetary reward."
Earlier, the Israeli army had dropped warning flyers from the air urging civilians to leave the northern Gaza Strip and migrate to the south.