Gaza: Israeli forces have martyred 23 Palestinians after opening fire on crowds gathered near an aid distribution site, witnesses and medics say.Tanks and drones fired at thousands of people near a distribution centre in central Gaza run by the US and Israel-backed Gaza Humanitarian Foundation (GHF), the witnesses and medics said.The Israel Defense Forces (IDF) said troops fired warning shots after people gathered nearby. An Israeli aircraft then struck "several suspects" who the IDF said continued walking towards troops.The GHF has denied a shooting occurred near its sites. The Hamas-run health ministry says more than 400 Palestinians have been martyred in similar incidents since late May.That is when the GHF took over most aid distribution in Gaza in an attempt by Israel to bypass the UN as the main supplier of aid.The move followed a complete three-month Israeli blockade during which no food entered the territory, putting the entire population at critical risk of famine according to a UN-backed a ssessment.In almost all incidents, witnesses have said that Israeli troops opened fire, although there have also been reports of local armed gunmen shooting at people.