West Brom boss Tony Pulis has said he would support lifetime bans for any of his club's fans found to be responsible for throwing seats during a chaotic conclusion to his side's FA Cup derby defeat at Aston Villa.
Villa's 2-0 quarter-final victory on Saturday was marred after home fans twice invaded the pitch. The club later issued an apology.
But, asked about seats being thrown from the North Stand, which housed the visiting fans, Pulis said: "If that was the situation, and they've got CCTV cameras up there, those supporters should never come into another football ground. It is like people coming into someone else's house - you have to show respect."