Northern Ireland's First Minister Peter Robinson has been admitted to hospital after a suspected heart attack.
He was taken in just after 9am this morning.
Sky News Ireland Correspondent David Blevins said: "Sources close to the party are telling us that he has been receiving treatment for a heart condition and that's what's caused this problem.
"We have no further update at the moment from the hospital but the Robinson family are requesting we give them some privacy."
The 66-year-old has had a "punishing schedule" over the last few weeks, Blevins added.
It is understood an ambulance took Mr Robinson to Ulster Hospital in Dundonald at around 9am this morning.
He was later transferred to Belfast's Royal Victoria Hospital.
Prime Minister David Cameron tweeted:
My best wishes to Northern Ireland's First Minister, Peter Robinson, who is in hospital. I hope he has a speedy recovery.
— David Cameron (@David_Cameron) May 25, 2015
Deputy First Minister Martin McGuinness posted: "Concerned to hear First Minister Peter Robinson has been admitted to hospital. My thoughts and prayers are with him, Iris & family."
Mike Nesbitt, leader of the Ulster Unionist Party, said: "I am sorry to hear that the First Minister has been taken into hospital this morning and I wish Peter a full and speedy recovery. Our thoughts are with him and his family."
Sinn Féin President Gerry Adams tweeted:
Peter Robinson in hospital. I hope he is ok.
— Gerry Adams (@GerryAdamsSF) May 25, 2015
Mr Robinson, who has three children, became First Minister and leader of the Democratic Unionist Party when Ian Paisley stepped down in 2008.
His party has had a turbulent few months.
In April, health minister Jim Wells resigned after claiming the children of gay couples were more likely to be abused.
The DUP then fought a tough battle to regain the Belfast East seat in the election, the seat Mr Robinson lost in 2010 in the wake of a scandal involving his wife.
The Northern Ireland Assembly is also due to hold a crucial debate on welfare reform tomorrow, with Mr Robinson warning the power-sharing assembly was in danger of collapse.
Originally published at 10.23am
