Palestinian children hold candles near buildings destroyed in Israeli air strikes in the southern Gaza Strip city of Rafah, on May 25, 2021. Limited international relief cargo, COVID-19 vaccines and aid workers are allowed into Gaza while the United Nations calls on Israel to open all crossings, UN humanitarians said on Tuesday. [Photo by Khaled Omar/Xinhua]

Palestinians hold candles near buildings destroyed in Israeli air strikes in the southern Gaza Strip city of Rafah, on May 25, 2021. Limited international relief cargo, COVID-19 vaccines and aid workers are allowed into Gaza while the United Nations calls on Israel to open all crossings, UN humanitarians said on Tuesday. [Photo by Khaled Omar/Xinhua]

Palestinian children hold candles near buildings destroyed in Israeli air strikes in the southern Gaza Strip city of Rafah, on May 25, 2021. Limited international relief cargo, COVID-19 vaccines and aid workers are allowed into Gaza while the United Nations calls on Israel to open all crossings, UN humanitarians said on Tuesday. [Photo by Khaled Omar/Xinhua]