St Mirren have secured their Premiership status by beating Dundee United in a penalty shoot-out.

United missed four penalties as St Mirren celebrated survival in a shoot-out win.

Paul McGinn and Mihai Popescu converted from the spot for the Saints, keeping Dundee United in the Championship for a fourth successive season.

Nicky Clark's penalty put United ahead in the first half but Danny Mullen levelled immediately in Paisley.

St Mirren's Duckens Nazon was then shown a straight red in extra-time before his side won the shoot-out.