Former DUP leader Arlene Foster and Alliance leader Naomi Long have been embroiled a bitter online spat over their policies on Stormont power-sharing.
The former First Minister accused Mrs Long of being "nasty", while the Justice Minister questioned Mrs Foster's leadership.
There were sharp exchanges on Twitter between the pair after Mrs Long called for reforms to enable a voluntary coalition government if the DUP refuses to rejoin the Executive following May's election.
