Martin McGuinness withdrew from a planned visit to China to undergo medical tests, it has been revealed.
Northern Ireland's First Minister, Arlene Foster, travelled to China last Sunday without Mr McGuinness.
Sinn Fein said the Deputy First Minister withdrew from the trip on medical advice and to enable doctors to conduct a medical assessment.
An Executive Office spokesperson said he was "fulfilling his responsibilities as deputy first minister working with his departmental political advisers".
"There has been no disruption to the work of The Executive Office during this period."
Sinn Fein President Gerry Adams TD said: "I’m sure everybody who values his work will send best wishes to Martin, Bernie and their family.
"I met with Martin as normal at Stormont on Monday. I have been in regular contact with him since and he is totally committed to fulfilling his duties."