UNITED NATIONS, May 22 (Reuters) – The United Nations expressed concern on Monday that Ukraine’s Black Sea port of Pivdennyi (Yuzhny) has not received any ships since May 2 under a deal allowing the safe wartime export of grain and fertilizer. 

U.N. spokesman Stephane Dujarric did not say who was to blame for the lack of ships traveling to the port, near Odesa, which is also where Russia used to pump up to 2.5 million tonnes of ammonia annually for export via a pipeline from Togliati.