Ukraine needs more air defences to protect its grain export routes as well as regions bordering Russia, President Volodymyr Zelenskiy said on Saturday, as he addressed an international summit on food security in Kyiv, Paralel.Az reports.

"There is a deficit of air defence - that is no secret," Zelenskiy told the Grain from Ukraine summit, which was attended by senior officials from European countries, including Swiss President Alain Berset and Lithuanian Prime Minister Ingrida Simonyte.

Zelenskiy was speaking after Russia attacked Ukraine with 75 drones overnight, the biggest drone assault of the war. The joint press conference of the three leaders was cut short by another air raid siren.

Zelenskiy said Ukraine would be supplied by its foreign partners with vessels to accompany convoys of cargo ships from Ukraine's ports to guarantee their security.

"I have agreements with several countries about powerful accompaniment of convoys by Ukrainians, but using (foreign) equipment," he said.