The incident happened over the weekend.
Sinn Féin vice-president Michelle O’Neill has had surgery after breaking one of her legs at the weekend.
The former Stormont health minister is said to be recovering well following the incident.
She attended the annual Pride parade in Belfast on Saturday and spoke to the public during the festival.
However, she did not attend a republican hunger strike commemoration event in Down on Sunday which was run by her party.
Sinn Féin have not released any further details about the incident.
“Michelle O’Neill suffered a leg break in an accident,” a Sinn Fein spokesman said.
“She underwent a procedure and is recovering well.”
O’Neill took over from Martin McGuinness as the party’s Stormont leader shortly before he died in March last year.
LISTEN: You Must Be Jokin’ with Aideen McQueen – Faith healers, Coolock craic and Gigging as Gaeilge
