Iranian Foreign Minister Mohammad Javad Zarif has warned about the continuation of the ongoing crackdown on Rohingya Muslims in Myanmar, urging the international community and the United Nations in particular to take swift action to end the crisis.

“It is expected that the United Nations act swiftly and undertake all necessary measures towards addressing international concerns about the deteriorating situation in Myanmar,” Zarif said in a letter to UN Secretary General António Guterres published on Friday.

He added that UN support for deescalating the violence, ensuring the dispatch of humanitarian assistance to the people in need and finding a sustainable solution to the crisis is essential and the body must act immediately.

Myanmar’s security forces have been attacking the Rohingya Muslims and torching their villages since October 2016 in a bid to push them out of the western state of Rakhine.