The United States has called on the Ukrainian authorities to hold the postponed elections in the city of Mariupol and other locations soon, U.S. Ambassador to Ukraine Geoffrey Pyatt has said.

"We urge the Ukrainian authorities to hold the postponed elections in Mariupol and other locations as soon as possible. We appreciate that President [Petro] Poroshenko has pressed for them to be held on November 15, along with the second-round of mayoral elections," he said at the U.S.-Ukraine Business Council and Kyiv School of Economics Conference on Legal and Governance Reform.

Pyatt praised the high turnout rate at the local elections held on October 25.

"The estimated turnout of 46% percent was in line with previous local Ukrainian elections, and significantly higher than U.S. local election participation," he said.

"The solid turnout and results show us that the Ukrainian people are firm in their demand for change. Newly-elected leaders must take those demands seriously, and stay firm in their commitment to reforms, including the decentralization of power," he said.