Here's a statement by Layla Moran where updates from her relatives in the church have shown that IDF soldiers and tanks have surrounded the church in the past two days and are still shooting anyone who goes outside of it or near the windows. Several of the wounded have already died as they have no medical supplies or food or water and the electrical generator was already destroyed by the IDF.
The toilets are in a separate external building, by the way, so they can't even access the bathrooms without risking being murdered.