Ammonia pipeline blast threatens Russia-Ukraine grain deal.

Russia has accused Ukraine of sabotaging a key ammonia pipeline, which was damaged in a blast on Monday, and warned that it may have a "negative" impact on efforts to renew a landmark grain export deal. Moscow has said it will not renew last year's grain export deal with Kyiv unless the pipeline is operational. However, President Volodymyr Zelensky denied the allegations and said the explosion was likely caused by Russian shelling. The pipeline, which runs from the Russian city of Togliatti to three Black Sea ports in southern and western Ukraine, exported 2.5 million tonnes of ammonia annually before the war.