Hundreds of Buddhists in Myanmar tried to block a shipment of aid to Muslims in Rakhine state where the United Nations has accused the military of ethnic cleansing, with a witness saying protesters threw petrol bombs before police dispersed them by firing into the air.

The protest was testament to rising communal animosity that threatens to complicate the delivery of vital supplies, and came as U.S. President Donald Trump called for a quick end to the violence that has raised concern about Myanmar's transition from military rule.

The aid shipment, being organized by the International Committee of the Red Cross (ICRC), was bound for the north of the state where insurgent attacks on Aug. 25 sparked a military backlash.