Nearly 1 million people fled Rafah in the past three weeks, the U.N. agency for Palestinian refugees (UNRWA) reported, with that number expected to rise following a weekend Israeli strike at a tent camp that killed 45 and drew worldwide condemnation.

UNRWA tweeted on Tuesday that there was “nowhere safe to go & amidst bombardments, lack of food & water, piles of waste & unsuitable living conditions” in Rafah. “Day after day, providing assistance & protection becomes nearly impossible,” it continued, and called for a cease-fire immediately.