Medical sources tell Al Jazeera that at least 29 people have been killed in Israeli attacks on Gaza since dawn this morning, 21 of that number being killed in Gaza City.A 20-year-old man has died in an Israeli prison as Palestinians mark Prisoners’ Day with marches across the occupied West Bank and East Jerusalem.Gaza’s Health Ministry says at least 51,065 Palestinians have been confirmed dead and 116,505 wounded in Israel’s war on Gaza since it began 18 months ago.The Gaza Government Media Office updated its death toll to more than 61,700, saying thousands of people missing under the rubble are presumed dead. At least 1,139 people were killed in Israel during the Hamas-led October 7, 2023, attacks, and more than 200 were taken captive.