Live news stream
Chinese President Xi Jinping said the crisis in Ukraine needed to be solved via diplomacy.
In a telephone conversation with German Chancellor Angela Merkel, Mr Xi said solution needed to be on the basis of international law, German government said in a statement.
German Chancellor Angela Merkel told Russian President Vladimir Putin referendum planned for March 16 on Crimea joining Russia violated Ukraine's constitution and was against international law.
The Chancellor also said she regretted that there had not been any progress on forming an "international contact group" which could find a political solution to the crisis in Ukraine.
ITV News cameraman Daniel Demoustier filmed an elderly lady with a Ukrainian flag being attacked by pro-Russian protesters in the eastern Ukrainian city of Donetsk.
One of Vladimir Putin's biggest critics, Mikhail Khodorkovsky, accused Russia of being complicit in police violence against Ukrainian protesters on Kiev's Independence Square.
The former Russian oil tycoon, addressing a crowd on the square where demonstrators rose up against Ukraine's Moscow-backed president, dismissed suggestions by Moscow that the protesters are "neo-fascists" bent on violence.
"Russian propaganda lies, as always. There are no fascists or Nazis here," Mr Khodorkovsky said.
A Ministry of Justice spokeswoman said: "The Government believes that any change to the law in this emotive and contentious area is an issue of individual conscience and a matter for Parliament to decide rather than Government policy."
David Cameron and Vladimir Putin have spoken on the phone about Ukraine, with the Prime Minister urging a de-escalation of the ongoing crisis in the country.
A statement from Downing Street said: "The Prime Minister called President Putin this morning to urge him to de-escalate the situation in Ukraine and to support the formation of a contact group that could lead to direct talks between the governments of Russia and Ukraine."
Number 10 added that both sides "agreed that it is in all our interests to have a stable Ukraine", noting that President Putin stated he was seeking a diplomatic solution to the ongoing tensions.
Mr Cameron also underlined the importance of Ukraine choosing its own future, stating "the elections, currently scheduled for the end of May, provide the best way to do this".
Officials investigating the disappearance of a Malaysian airliner with 239 people on board are narrowing the focus of their inquiries on the possibility that it disintegrated in mid-flight, a senior source has told Reuters.
Malaysia Airlines flight 370 vanished after climbing to a cruising altitude of 35,000 feet between Kuala Lumpur and Beijing on Saturday, but search teams have still not been able to make any confirmed discovery of wreckage in seas beneath the plane's flight path almost 48 hours after it took off.
"The fact that we are unable to find any debris so far appears to indicate that the aircraft is likely to have disintegrated at around 35,000 feet," said the source, who is involved in the investigations in Malaysia.
If the plane had plunged intact from such a height, breaking up only on impact with the water, search teams would have expected to find a fairly concentrated pattern of debris, said the source, speaking on condition of anonymity because he was not authorised to speak publicly on the investigation.
Pro-Russian supporters have clashed with Ukrainian supporters in the city of Sevastopol:
A Vietnam Navy plane has found an object suspected of belonging to the missing Malaysian Airlines plane, according to the Civil Aviation Authority of Vietnam.