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.
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.”
More than 530,000 Rohingyas have fled the country in less than two months.
The Nobel Peace laureate’s remarks came in her first address to the nation since a military operation forced 410,000 Rohingya to flee the country.
The brutal crackdown on Myanmar’s Muslim minority is a reminder of ethnic violence in Rwanda and Bosnia.
The burning of villages and eradication of Rohingya communities might have more to do with development projects funded by China than with religious prejudice.
Min Aung Hlaing should be treated as a pariah by now.