Kiev and Moscow accuse each other of the explosion of a gigantic ammonia pipeline. The blast took place Monday night near Massyutovka, a small village controlled by Russian forces in the Kharkiv region of northeastern Ukraine.
The pipeline, which connects the Russian city of Togliatti on the banks of the Volga River to Odessa, Ukraine's most important port on the Black Sea, allowed Russia to export more than 2.5 million tonnes of ammonia to the European Union annually.