The Russian embassy has poked fun at Britain for its silence over the ceasefire in Syria - and asked Twitter to decide why the UK has made no comment.

A nationwide Syrian truce brokered by Russia and Turkey went into effect at midnight and was holding today despite minor violations, marking a potential breakthrough in the brutal conflict.

But staff at the Russian embassy in London have taken a swipe at Britain today, claiming there had been 'No UK reaction' to the deal.

It then asked the question, 'why?' before giving three possible reasons: 'Jealousy', 'FCO on holiday' or 'can't believe'.

The Russian embassy has poked fun at Britain for its silence over the ceasefire in Syria - and asked Twitter to decide why the UK has made no comment

A nationwide Syrian truce brokered by Russia and Turkey went into effect at midnight and was holding today despite minor violations, marking a potential breakthrough in the brutal conflict

Staff at the Russian embassy in London have taken a swipe at Britain today, claiming there had been 'No UK reaction' to the deal. Russian president Vladimir Putin is pcitured above

Twitter users are able to vote on their preferred choice and by late morning today, more than a thousand votes had been cast.

Just before noon, 'jealousy' was the leading option with 48 per cent of the vote followed by the suggestion that the Foreign and Commonwealth Office was on holiday (28 per cent) and then 'can't believe' (24 per cent).

Russian President Vladimir Putin said Thursday that the cease-fire will be guaranteed by both Moscow and Turkey, and the agreement has been welcomed by Iran. Moscow and Tehran provide crucial military support to Syrian President Bashar Assad, while Turkey has long served as a rear base and source of supplies for the rebels.

Iran's Foreign Minister Mohammad Javad Zarif called the cease-fire a 'major achievement' in a tweet Friday. 'Let's build on it by tackling the roots of extremist terror,' he added.

Russia said the deal was signed by seven of Syria's major rebel factions, though none of them immediately confirmed it, and one denied signing it.

The truce came on the heels of a Russian-Turkish agreement earlier this month to evacuate the last rebels from eastern Aleppo after they were confined to a tiny enclave by a government offensive. The retaking of all of Aleppo marked Assad's greatest victory since the start of the 2011 uprising against his family's four-decade rule.

Mockery: This was how Russia's embassy in London responded to a US sanctions announcement, mocking Obama as a lame duck president

The same embassy had earlier hit back at Barack Obama's retribution for the alleged hacking of the US presidential campaign by insinuating the outgoing leader is a 'lame duck'

The embassy's provocative tweet was posted against the back drop of diplomatic tension between Russia and the West.

The same embassy had earlier hit back at Barack Obama's retribution for the alleged hacking of the US presidential campaign by insinuating the outgoing leader is a 'lame duck'.

Mr Obama ordered 35 Russian diplomats to leave the US and shut down a pair of Russian compounds in New York and Maryland.

Moscow, which denies trying to swing the election in Donald Trump's favour, threatened retaliation and branded the Obama administration 'losers'.

On Thursday, Russia's embassy in London took to Twitter where it posted a picture of a duck captioned with the word 'lame'.

'President Obama expels 35 (Russian) diplomats in Cold War deja vu. As everybody, incl (American) people, will be glad to see the last of this hapless Adm,' it added.

The US says Russia was behind cyber attacks on the Democratic National Committee and Hillary Clinton's campaign chairman.