The envoy 'heard from the people accounts of unimaginable atrocities committed in Rakhine State,' said a UN statement.
Bangladesh launched the crackdown to smash the surging trade in 'yaba', a cheap methamphetamine and caffeine pill, which authorities say has spread to almost every village and town.
Bangladeshis constitute one of the largest numbers of visitors from a single country to India. Last year, India the country issued 1.4 million visas to Bangladeshi nationals, BD News reported
Peter Maurer toured strife-torn western Myanmar before visiting refugee camps over the border in neighbouring Bangladesh, where nearly one million Rohingya have sought refuge from violence
UN spokeswoman Ravina Shamdasani said Bangladesh's minister of law had assured Zeid there would be an investigation
The United Nations said it had struck an outline deal with Myanmar aimed at eventually allowing hundreds of thousands of Rohingya Muslims sheltering in Bangladesh
Saad Hammadi speaks with the political adviser to the Bangladesh PM
Bangladeshi Govt instruct locals to feed Rohingyas'