Israel and the U.S. said the cause was a failed rocket launch by anti-Israeli Palestinian militants in Gaza who denied responsibility.
Amid fears the conflict could spread beyond Gaza, Biden had planned to meet Arab leaders.
But Jordan called off his planned summit there with Egypt and the Palestinian Authority after the hospital blast.
During Biden's visit, Prime Minister Benjamin Netanyahu's office said Israel would let food, water and medicines reach southern Gaza via Egypt.
En route to Washington, Biden told reporters he was blunt with Israel about the need to facilitate aid to Gaza.
Persons:
Dilara, Lior Haiat, Joe Biden, Abdel Fattah El, Biden, Sisi, John Kirby, Jordan, Martin Griffiths, Rishi Sunak, Benjamin Netanyahu's, Israel, West Bank . Mark Negev, Netanyahu, that's, Nidal, Steve Holland, Cynthia Osterman, Howard Goller
Organizations:
Consulate, Hamas, REUTERS, Biden, Gaza UN, TEL, U.S ., Palestinian, Israel's Foreign Ministry, Palestinian West Bank, West Bank, Wednesday, Palestinian Authority, Security, House, British, United Nations, West Bank . Mark, CNN, Aboard Air Force, Thomson
Locations:
Israel, Istanbul, Turkey, Egypt, Gaza, TEL AVIV, GAZA, U.S, Ahli, Arabi, Israeli, Iran, Jordan, Lebanon, Tunisia, Ukraine, Rafah, Washington, United States, Tel Aviv, Jerusalem