Watch: Fans clash on Ibrox pitch after Celtic knock Rangers out of Scottish Cup on penalties

The Hoops progressed to the semi-finals despite failing to register a single shot on target in 120 minutes of action.

IBROXING MATCH: Celtic fan invade the pitch following their team penalty shoot out win. Pic: Steve Welsh/PA Wire.

Scottish Cup quarter-final: Rangers 0 Celtic 0 (after extra time)

Celtic win 4-2 on penatlies