International Criminal Court prosecutors will examine alleged crimes against Rohingya Muslims, but weren't authorized to investigate the accusation of genocide.
The country's leader has failed to speak out against atrocities targeting the country's Rohingya minority, Amnesty said.
Elephants have killed an estimated 13 Rohingya in Bangladesh's largest refugee camp.
Aung San Suu Kyi, a Nobel Peace Prize winner, is accused of turning a blind eye to the massacre of Rohingya Muslims.
Some 626,000 Rohingya have fled violence since August.
But he left out a very important word.
The U.S. is pledging aid to the “staggering” humanitarian crisis in Myanmar and Bangladesh while calling for an investigation of the reported atrocities.
The Nobel Peace Prize winner has faced heavy international criticism for not taking a higher profile in responding to what U.N. officials have called “ethnic cleansing” by the army.
More than 600,000 persecuted Muslims have fled Myanmar in just two months.
“We are exploring accountability mechanisms available under U.S. law, including Global Magnitsky targeted sanctions.”