"According to Minab's mayor, the compound had been closed for about 15 years and all military personnel had moved out; the school was the only operational facility at the former base"
Al Jazeera says it was likely deliberate: https://www.aljazeera.com/news/2026/3/3/questions-over-minab-girls-school-strike-as-israel-us-deny-involvement
Trump said it was Iran that did it initially, then backtracked and said "mistakes were made"