Hamas said in a social media post that foreign nationals were among the dead hostages.
Hamas militants have claimed the deaths of 13 previously taken hostages as a result of Israeli strikes on the Gaza Strip.
Hamas said in a social media post that foreign nationals were among the dead hostages. Six people were killed in two different locations in North Gaza province, while seven other hostages were killed in three locations in Gaza province.
The IDF struck the Gaza Strip on the night of October 13, hitting 750 targets, including underground tunnels, posts and military warehouses, and the homes of senior Hamas officials.
Earlier, a spokesman for the group said that an attack on Israel had been prepared since 2022.