Mary Lou McDonald warns DUP against any moves to destabilise Stormont

Sinn Féin leader Mary Lou McDonald speaks to the media in Belfast, (Brian Lawless/PA)

Mary Lou McDonald has warned the DUP against any move that could destabilise powersharing in Northern Ireland.

The Sinn Féin president was speaking in Belfast hours before the DUP's election for a new leader following the resignation of Arlene Foster.