The Football Association are set to launch an investigation after crowd problems at Aston Villa during their FA Cup win over West Brom.
There were two pitch invasions – one before the end of the game – from home supporters and Albion fans threw seats at the Villa crowd during the game.
The FA are also believed to have had a crowd control advisor at the game who will report back following Villa's 2-0 win, Press Association Sport understands.
In the second half there were a number of seats thrown from the upper tier of the North Stand, where Albion fans were sitting, down on home supporters below.
Villa fans then invaded the pitch minutes before the final whistle, forcing the game to be temporarily stopped, and then again at full time as the players tried to run off.
Fabian Delph called the invasion "scary" and West Brom keeper Ben Foster tweeted "PLEASE just get home safe everyone. Stupid scenes.."
Baggies boss Tony Pulis confirmed his players were fine despite the fans spilling onto the pitch.
He said: "Everyone looked as though they had their heads on, their arms on and their legs on. Nobody said anything to me.
"I'm sure Villa are disappointed that it's happened."
Villa chief Tim Sherwood added: "I ran off as soon as I could. I'd rather talk about the football."
Delph and Scott Sinclair scored to send Villa to a Wembley semi final while Claudio Yacob and Jack Grealish were sent off as both sides finished with 10 men.
The following images show some of the scenes after the Aston Villa-WBA game with seats thrown (one of which resulted in a head injury):
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