Hamilton Academical stayed within two points of the Scottish Premiership summit after dominating a poor St Mirren side.
Tony Andreu put the hosts 1-0 in front before half time and Mickael Antoine-Curier doubled the lead from close range midway through the second-half.
Ali Crawford added a third as the hosts ended a four game run without a win.
Despite a late rally, Tommy Craig's St Mirren remain second bottom, ahead of Ross County on goal difference.
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