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President Obama has described talks between Russian and western powers on Ukraine as "promising".
But he added the US is still prepared to impose sanctions on Russia, should the situation fail to improve.
"There is the possibility, the prospect, that diplomacy may de-escalate the situation," he told reporters at the White House.
"The question now becomes will in fact they use the influence they've exerted in a disruptive way to restore some order so that Ukrainians can carry out an election and move forward with the decentralization reforms that they've proposed," he said.
MPs are increasingly put off Prime Ministers Questions (PMQs) by the "histrionics and cacophony of noise", the Speaker of the House of Commons has warned.
John Bercow said women MPs and "seasoned parliamentarians" had given up attending the weekly question and answer session because of bad behaviour by other members of the house.
Mr Bercow said Parliament was "spray painting its own shop window" by appearing to generate higher decibel levels than heavy metal band Deep Purple, regarded as the loudest band in the world in some quarters.
He told BBC Radio 4's PM programme there are "down-market parts of the media" who would "positively relish" it if there was a fight on the floor of the Commons chamber.
Tens of millions of pounds worth of compensation was awarded to teachers in the last year for accidents, attacks and discrimination at work.
Figures show a surge in payouts to school staff, with the overall totals reaching record levels.
One 33-year-old West Midlands teacher received more than £300,000 after she was injured breaking up a fight between two pupils.
Information obtained from three of the UK's largest unions show that a number of school staff were handed five or six-figure payouts, with figures indicating that the total amount paid out in compensation last year stretched to more than £40 million.
The NASUWT teaching union said it secured around £20.7 million for its members in 2013 - over 30% more than in 2012.
In a court in New York, the radical Islamic cleric, Abu Hamza has been accused of using his religion to hide his recruitment of terrorists in Britain.
Mr Hamza was extradited from the UK to America two years ago to face a string of terrorism charges.
President Obama strategist David Axelrod has tweeted he is proud to be working with Ed Miliband.
Labour leader Ed Miliband has welcomed the news US presidential strategist David Axelrod is to join the party's election campaign.
He said: "It's excellent news that David has agreed to help One Nation Labour win the next election and build our campaign to change Britain so hard-working people are better off.
"He will be a huge asset to our campaign as we work to show the British people how we can change our country for the better."
One of US President Barack Obama's top campaign strategists has been recruited by Labour to play a key role in Ed Miliband's bid for Downing Street in next year's general election.
David Axelrod, who is credited with masterminding Mr Obama's presidential victories in 2008 and 2012, will join Labour's general election campaign team as a senior strategic adviser, the party announced.
ITV Weather Presenter Alex Beresford has the latest forecast:
Green Party MP Caroline Lucas MP has been found not guilty at Brighton Magistrates' Court of obstructing a public highway and a public order offence during an anti-fracking protest at Balcombe, West Sussex.
ITV News Correspondent Martin Geissler reports:
UK Prime Minister David Cameron has insisted agreements aimed at calming tensions in Ukraine must be implemented rapidly, Downing Street has said tonight.