Shane Duffy on the scoresheet as Celtic beat St Mirren to close the gap on Rangers

It is the Ireland defender's second goal in two games since joining on loan from Brighton

Celtic's Shane Duffy (right) celebrates scoring his side's first goal of the game

Shane Duffy was on the scoresheet as Celtic scored two headers as they beat St Mirren 2-1 to move into second place in the Scottish Premiership.

Saints striker Lee Erwin, making his first start since signing from Ross County last week, bundled in a shock opener from a corner in the third minute in Paisley.