GENEVA — Myanmar’s army commander and other top generals should face trial in an international court for genocide against Rohingya Muslims and for crimes against humanity targeting other ethnic minorities, United Nations experts said on Monday after a yearlong investigation.

Senior Gen. Min Aung Hlaing, the commander in chief of Myanmar’s army, is one of six generals named as priority subjects for investigation and prosecution by a United Nations Fact Finding Mission on Myanmar in a report detailing military campaigns involving atrocities that “undoubtedly amount to the gravest crimes under international law.”

The three-member panel leveled the most serious charge, genocide, over the ferocious campaign unleashed by the Buddhist-majority security forces against Rohingya Muslims a year ago. That campaign, in the state of Rakhine, sent more than 700,000 fleeing across the border to Bangladesh.

Myanmar has rejected allegations of widespread atrocities, asserting that its security forces were simply responding to attacks by Rohingya militants on Myanmar police posts and an army station on Aug. 25 last year. But the panel said there was enough information to warrant investigation and prosecution of senior officers “so that a competent court can determine their liability for genocide.”