In Gaza's southernmost city, where more than a million Palestinians have sought shelter and where aid groups have centralized operations, worries have grown over a possible Israeli military operation.
Intelligence officials and lawmakers describe the Chinese-owned social media app as a national security threat. But they haven't shared that evidence with the public.
Five of the 31 tanks have already been lost to Russian attacks in Ukraine, where the use of surveillance and hunter-killer drones had made it difficult for them to operate.