Indonesia proposes demilitarised zone, UN referendum for Ukraine peace plan

"I propose that the Shangri-La dialogue find a mode of... voluntary declaration urging both Ukraine and Russia to immediately start negotiations for peace," Prabowo said.

Indonesia's proposal follows President Joko Widodo's visit year to Moscow and Kyiv, where he offered to play peace broker between their leaders and rekindle peace talks. He was also chairman of the G20 group of major economies at the time.

Speaking on the same panel, Josep Borrell Fontelles, high representative and vice president of the European Union's European Commission, noted that if military support for Ukraine stopped, the war would quickly end - but with that country's sovereignty falling to outside aggression.

"We cannot stop supporting militarily Ukraine because we don't want the peace which is ... the peace of the surrender. The peace of the stronger," Borrell said.