The Palestinians and rights groups accuse Israel of recklessly endangering civilians. Hamas and Gaza health officials deny militants operate in Shifa - a hospital that employs some 1,500 people and has more than 500 beds. The Associated Press could not independently verify the Israeli claims that the weapons were found inside the hospital. The military released video from inside Shifa showed three duffel bags it said it found hidden around an MRI lab, each containing an assault rifle, grenades and Hamas uniforms, as well as a closet that contained a number of assault rifles without ammunition clips. The allegation is part of Israel's broader accusation that Hamas uses Palestinians as human shields. After encircling Shifa for days, Israel faced pressure to prove its claim that Hamas was using the patients, staff and civilians sheltering there to provide cover for its fighters. Troops were searching the underground levels of the hospital on Thursday and detained technicians responsible for running its equipment, the health ministry in Hamas-run Gaza said in a statement.