I've read that 12 people out of UNRWA's staff of 13,000 are alleged by Israel to have been involved in the 7 October attack. Nine people have been fired by the UN, one is among over 100 UNWRA staff who've been killed by the Israeli attacks on Gaza, and the situation of two others is being clarified. Here's a good CNN report.
It's often hard to find good information about Israel's war on Gaza, because so many reporters, writers and poets are being killed; by mid-January 13 Palestinian poets and 68 journalists had been killed.