The prime minister left the room while all the other EU leaders discussed whether to delay Brexit.

Now, she's been called back in.

The European Council President Donald Tusk has tweeted that all EU leaders have agreed a delay - although he hasn't given a date.

Mr Tusk said he will now talk to Theresa May to see if she accepts it.

There are reports in Brussels that the 27 EU leaders have agreed to delay Brexit until 31 October with a review in June.

The talk in Brussels is that EU leaders have agreed a Brexit delay until 31 October.

According to diplomatic sources quoted by Reuters, the EU will review this extension in June.

But the development has not been confirmed elsewhere and BBC News Reality Check correspondent Chris Morris cautions that this is "not a done deal".

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BBC Europe correspondent Damian Grammaticas says the EU's 27 leaders have all now had their say on Theresa May's request for a delay until 30 June and the discussions are going around the table again.

He says: "They are going round to see what people say a second time and how opinions might shift a little bit, and how the debate shifts a bit too."

But our correspondent says while there was talk going into the summit of the EU insisting on a possible extension being granted until April 2020, 17 countries are now in favour of a delay until the end of the year and France is sticking with the end of June as a "hard end date".

Stephen Walker
BBC News NI Political Correspondent

Image source, PA

The DUP leader Arlene Foster says she will set out her party's opposition to Theresa May's withdrawal agreement when she meets with the EU's chief negotiator Michel Barnier in Brussels on Thursday.

Arlene Foster is to attend the meeting with the party's MEP Diane Dodds and Conservative MPs Owen Paterson and Iain Duncan Smith.

The DUP leader says she will outline alternatives to the Northern Ireland backstop proposal contained in the PM's deal.

Speaking to BBC Northern Ireland she says this is an "evolving process" and there is now "an opportunity to pause and look at the backstop".

Ms Foster earlier said she will also tell Michel Barnier that "the European Union has spoken much about protecting the peace process and the Belfast Agreement but has consistently ignored the views of unionists".

She is also critical of the prime minister's approach, saying she tried to "force people into a cul-de-sac where they have no option but to support her deal".

The DUP leader adds the party would fight the European Elections if they take place and confirmed that current Northern Ireland MEP Diane Dodds had already been ratified as a candidate.

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The BBC's Christian Fraser in Brussels says rigorous conditions will be imposed on any Brexit extension granted to the UK to try to allay fears it would play "hard ball".

Our correspondent says there will be no renegotiation of the withdrawal agreement, there will be no in-depth renegotiation of the future relationship and the UK would be expected to take part in the European elections if a deal is not ratified by the end of the week.

Our correspondent says there is this concern that the UK could become "some sort of truculent member on its way out, getting in the way of the EU budget, over the selection of commissioners, the head of the commission".

He adds, that is why it is understood that France has put a paragraph in the draft conclusions - which could change when the final summit declarations are published - which would commit the UK to "uphold the rules and behave".

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BBC News correspondent Chris Morris says opinion among leaders as to the length of any Bexit delay granted to the UK is divided as the discussions continue in Brussels.

It is understood that most of the EU leaders who have spoken so far have argued in favour of granting a longer extension to the UK - one that could potentially delay Brexit until at least the end of 2019, he says.

Germany, Portugal, Italy, the Czech Republic and Portugal have all called for a longer delay than Theresa May is asking for.

However, France's Emmanuel Macron is known to be one of the leading voices calling for a shorter extension to "put more pressure on the UK" to come up with a solution.

The Austrian chancellor has also backed a short extension, our correspondent says.

Kevin Connolly, BBC Europe Correspondent

Image source, Getty Images

The choreography of Brexit summits in Brussels has become familiar.

Theresa May addresses her fellow leaders, takes questions and then withdraws, leaving them to debate their response over dinner.

Leaked impressions of her performance this evening, which lasted for an hour and six minutes, suggest it was better received than her presentation three weeks ago.

Her suggestion of a Brexit extension until 30 June probably won’t be approved.

Instead it's expected she’ll be offered a longer but more flexible delay to Brexit – a maximum of a year perhaps, but which would end whenever parliament approves the withdrawal agreement.

The leaders are thought to be discussing ways in which they could guarantee that the UK won’t disrupt EU business - a particular concern it is thought for French President Emmanuel Macron.