Decisive steps particularly need to be taken to fight corruption, which remains the most frequently mentioned obstacle to doing business in Ukraine.

Poverty rates are estimated to have increased, with access to services hampered in conflict-affected areas. The international partners are ready to support the efforts of the government of Ukraine on recovery of the infrastructure and peacebuilding, tailored to the specific needs of conflict-affected communities.

as you work to curb corruption, improve tax administration, strengthen intellectual property rights protection, modernize Ukraine’s Customs Service, and complete land reform legislation.

The parties addressed the Russian-Slovak cooperation in the gas sector, discussing, inter alia, the collaboration between Gazprom and Slovak companies in gas supply and its transit via the Republic.

Shipping 110bn m³/yr would cost Gazprom a quarter of the amount it would spend if it used Nord Stream, while booking capacity for 70bn m³/yr would still cost it only a third as much.

The US officials gave a positive assessment of Ukraine's sourcing of gas from Europe and the ongoing reform at Naftogaz and Ukraine’s gas market. They also commended the implementation of the corporate governance reform, which was based on OECD principles for state-owned enterprises.

Ukraine, once one of Russia’s biggest foreign gas buyers, had a debt of more than $29 billion before Tuesday’s bill, according to Gazprom. Naftogaz has demanded almost $26 billion from Gazprom in Stockholm arbitration, claiming it overpaid for supplies and was paid too little for transit, with a court ruling not expected before the middle of the year.

In July 2014, at the height of the Crimean Crisis, Ukraine imported gas from Western Europe, and particularly from Germany for $370 per 1,000 cubic metres. Earlier in the 2014, the country had paid $273 per million cubic metres for gas from Russia.

The two PMs were reacting to a preliminary agreement between Russian giant Gazprom and Western energy concerns including BASF, E.ON, ENGIE, OMV and Shell on doubling the transport capacity of Nord Stream in early September.

Ukraine has asked Russia to reduce the cost it charges the country for gas as well as write-off loans Russia has given it.