In an interview with Lebanese journalist Marlene Khalifeh, when asked about the hostages captured in the October 7 attack:

“There are the captured soldiers and they will be swapped in a prisoner exchange after [Israel’s] aggression is over. They constitute most [of the prisoners]. There is a large number of them, but I won’t disclose how many. There are also people who were brought to Gaza by various means, but not by the resistance [i.e. not by Hamas itself]. Some of them have dual citizenship and some of them are foreigners. We have counted over 51 dual citizens. Under the current circumstances we cannot count all of them, since they are not in Hamas’s possession… They are not in our possession and are located throughout the Gaza Strip. Some of them are held by other forces, and some by other elements.”“Senior Hamas Official Osama Hamdan: If We Could Turn Back Time, We Would Carry Out The October 7 Attack On Israel All Over Again,” MEMRI, November 7, 2023, https://www.memri.org/reports/senior-hamas-official-osama-hamdan-if-we-could-turn-back-time-we-would-carry-out-october-7.