Sinn Fein's leader in Northern Ireland, Michelle O'Neill, claimed her party had stretched themselves and had reached an accommodation with the leadership of the DUP before they collapsed the talks.
Theresa May's government should consider imposing social changes on Northern Ireland, such as gay marriage, in the absence of a deal to restore power-sharing at Stormont, Labour has said. Foster and the DUP to raze the Northern Ireland government over the canard that an Irish Language Act is a "new demand" is unconscionable.
The two parties, representing mainly Catholic proponents of a united Ireland and Protestant supporters of continued rule by Britain, have failed to meet a number of deadlines. "Absolutely. When, I can not be sure", McDonald told reporters.
"The position of the United Kingdom government remains the same: devolved government is in the best interests of everyone in Northern Ireland and is best for the union".
"Whether it is this week, whether it is in a couple of weeks or whether it's in a couple of months what I must ensure is that we have an accommodation that everybody feels content with".More news: Alzheimer's disease reversed in mouse model
The talks ended on Wednesday after the DUP declared there was "no current prospect" of a deal.
Foster's colleague Simon Hamilton told reporters agreement was "impossible" at this time but that the DUP wanted to pick the talks up at a future date.
The British and Irish prime ministers met political leaders in Belfast on Monday, as the two main parties in Northern Ireland edged closer to unlocking a political stalemate that has left the region of 1.8 million people without a government for more than a year.
"Good Friday was only made possible when the USA signaled its interest in Northern Ireland by appointing a capable Special Envoy in the person of Senator George Mitchell", the letter stated.
The DUP leadership is said to have been "spooked" by the level of opposition to such an act, not only inside the party but in the wider unionist community.More news: Litecoin Nearly Doubles Its Value in Under 2 Weeks
The DUP is now calling for direct rule from London.
A succession of Prime Ministers have worked hard to deliver agreements but there's only so much they can do, ultimately it is down to Northern Ireland's leaders, she added.
Mrs Foster blamed a dispute over Irish language legislation for Wednesday's breakdown in negotiations, with Sinn Fein wanting standalone laws to protect speakers.
Ireland's foreign minister said that as co-guarantors of the 1998 peace deal, both governments have an obligation to uphold the letter and spirit of that agreement and that Dublin must "reflect in the coming days on how best to do that".More news: Pakistan will have to pay for its misadventures, warns Nirmala Sitharaman