An Israeli strike on a Gaza ambulance convoy has killed 15 people, Palestinian medics said Saturday, spurring concerns for health workers' safety as Israel accused Hamas of using the vehicles to transport fighters. More than 9,200 people have been killed so far in Gaza by the Israeli military campaign, according to the Hamas-run health ministry. The strike on Friday killed 15 people and wounded 60 others, it said, mirroring figures released earlier by the Hamas-run health ministry. A second deadly strike hit the PRCS ambulance, carrying a wounded woman, as it approached Al-Shifa's gates, the Palestinian Red Crescent said. UN Secretary-General Antonio Guterres said in a statement he was "horrified by the reported attack in Gaza on an ambulance convoy outside Al-Shifa hospital".