UN Security Council called on Myanmar's government to end its military campaign against the Rohingya Muslims.
The 15-member Security Council met behind closed doors on Wednesday, at the request of Sweden and Britiain, to discuss the crisis for the second time since it began and agreed to publicly condemn the situation.
Around 370,000 of Myanmar's minority Rohingya population have fled the country's western state of Rakhine into neighbouring Bangladesh in recent weeks, according to the UN.
The violence began on August 25, after Rohingya fighters attacked police posts, prompting a military crackdown.
The council "expressed concern about reports of excessive violence during the security operations and called for immediate steps to end the violence in Rakhine, de-escalate the situation, re-establish law and order, ensure the protection of civilians ... and resolve the refugee problem."
British UN Ambassador Matthew Rycroft said it was the first statement from the Security Council on Myanmar in nine years.
This comes as Myanmar's national leader Aung San Suu Kyi cancelled her trip to next week's UN General Assembly to deal with the crisis, her office said on Wednesday.
She is due to give her first speech on the situation in a televised address next week.
Suu Kyi has been widely condemned for a lack of moral leadership and compassion in the face of the crisis, denting the Nobel peace laureate's reputation.
The secretary-general also said he has spoken to Suu Kyi several times.