The Israeli military knows Hamas took "dozens" of hostages, but is still trying to figure out the exact figure
From CNN's Niamh Kennedy in London

The Israel Defense Forces (IDF) is trying to establish the exact number of hostages that have been taken into Gaza, with the military’s international spokesperson emphasizing the “complicated” nature of the situation to CNN on Sunday.

Speaking to CNN’s Laila Harrak in an interview from Tel Aviv, IDF spokesman Lt. Col. Richard Hecht said the IDF understands that “dozens” of hostages have been taken into Gaza.

“Because life here is very sacred, we're making sure that we come out and understand the numbers exactly,” Hecht added.

A group of militia members transport an elderly Israeli woman captured in the Kfar Azza kibbutz, in Israel, on October 7, 2023, in the Gaza Strip.