There are a "number of ideas being floated" to help get Ukrainian and Russian grain and fertilizer to global markets after Moscow quit a deal allowing the safe Black Sea export of Ukraine grain, the United Nations said on Tuesday.

The Black Sea deal was brokered by the U.N. and Turkey in July last year to combat a global food crisis worsened by Russia's February 2022 invasion of Ukraine. Ukraine and Russia are among the world's top grain exporters.

Russia's withdrawal on Monday, which included revoking its guarantees for safe navigation, also ended a pact between the United Nations and Moscow in which U.N. officials agreed to help Russian food and fertilizer exports reach world markets.