Russia refuses to review gas deal with Ukraine
After failing to get a discount from Moscow, Ukraine has sought to cut the volume of its imports of gas which were originally agreed at 52 billion cubic metres (bcm) a year under a 2009 agreement.
But Miller said Gazprom was against that.
"We are working strictly in line with the contract, strictly in line with this volume," Miller told reporters after a Russian government delegation led by Prime Minister Dmitry Medvedev held talks with the Ukrainian government in Kiev.
(Reporting by Andrei Ostroukh; Writing by Olzhas Auyezov; Editing by Richard Balmforth)