US military officials briefed on investigation make disclosure, while Pentagon has confirmed only that inquiry is under way

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Military investigators believe it is likely that US forces were responsible for an apparent strike on an Iranian girls’ school that killed scores of children on Saturday but have not yet reached a final conclusion, according to two US officials.

Reuters was unable to determine further details about the investigation, including what evidence contributed to the tentative assessment, what type of munition was used, who was responsible or why the US might have struck the school.