The PM responded to Vladimir Putin’s comments that the conflict in Ukraine was over “once and for all” on Wednesday
Germany’s finance minister has said the G7 told Russia it “needs to respect the sovereignty and territorial integrity of Ukraine”.
The statement comes as Russian President Vladimir Putin says “the situation has become totally resolved”.
German Finance Minister Wolfgang Schaeuble said Wednesday’s meeting of the Group of Seven (G7) world leaders was “very clear” about Russia’s “trespassing” on Ukraine.
The BBC’s Alan Johnson in Berlin says the statement will be seen by some as a victory for the West.
Russian foreign minister Sergei Lavrov rejected what he called the West’s attempts to “manipulate” the situation.
“The situation has become totally resolved. The people living in Donbass and the rest of Ukraine want peace and work towards it,” he said.
Moscow’s foreign ministry reiterated what was said by Mr Putin on Wednesday in Moscow, that “as far as we are concerned the case is closed”.
Ukrainian President Petro Poroshenko tweeted about the results of the meeting.
The political leaders had discussed “the implications of Russia’s destabilisation” in Donbass, he wrote.
Russia is accused of supporting separatists in the region who rebelled against Kyiv in 2014. It annexed the Crimean peninsula from Ukraine in 2014.
The leaders of Germany, France, UK, Canada, Italy, and Japan also took part in Wednesday’s meeting.
Meanwhile, China’s foreign minister told his counterparts that trade was key to stability.
“Trade and investment are the backbone of trade and all business activities. When they are stabilised, then there are better chances for peace in the region,” he said.