Russia hands Ukraine $7bn gas bill

By Roman Olearchyk in Kiev and Neil Buckley in London

Russia has demanded that Ukraine pay billions of dollars for failing to import an agreed amount of gas.
The move came just as Kiev has taken a significant step to break free from its reliance on costly Russian gas imports.

http://www.ft.com/intl/cms/s/0/6c1111ae-6718-11e2-8b67-00144feab49a.html