CAIRO/JERUSALEM, Aug 1 (Reuters) - President Donald Trump's Middle East envoy became the first high-profile U.S. official to visit Gaza since the war began, touring a U.S.-backed aid operation on Friday that the United Nations says is partly to blame for deadly conditions in the enclave.

U.S. Ambassador to Israel Mike Huckabee also visited Gaza "to learn the truth about" Gaza Humanitarian Foundation sites.

US President Donald Trump's Middle East envoy Steve Witkoff has for the first time visited a controversial Israel- and US-backed aid distribution site in Gaza. Witkoff went with US ambassador to Israel Mike Huckabee in a delegation accompanied by the Israel Defense Forces (IDF).