Antonio Guterres has called for the freeing of exports of unsanctioned fertiliser and ammonia from Russia to head off a global food shortage.

The UN Secretary-General made the call as he praised the UN-coordinated scheme to allow the restart of grain exports from Ukraine that had been blocked for nearly six months after Russia’s invasion and paralysis of the country’s ports.

Addressing world leaders at the opening of the UN’s General Assembly in New York he said it was vital to remove all blocks to the export of fertiliser and their ingredients, including to ammonia.