West Bromwich Albion have vowed to take strong action against any of the club's fans found to have been involved in disturbances at the FA Cup quarterfinal against Aston Villa on Saturday.
Seats were thrown from the West Brom section in Villa Park and Villa supporters invaded the pitch twice during the game as Tim Sherwood's men won 2-0 on Saturday to reach the semifinals of the competition.
Police have made 17 arrests related to the game and a spokesperson for the Football Association has told Press Association Sport its investigation into the incidents will begin on Monday.
Villa issued an apology after the game to "the Football Association, the West Bromwich Albion directors, manager Tony Pulis and all his staff and players," and Albion announced in a statement on Sunday that the apology had been "received in the spirit with which it was intended."
"West Bromwich Albion note the public apology issued by Aston Villa FC in the wake of the disturbing scenes during and after the FA Cup quarterfinal at Villa Park," read the statement. "The apology is received in the spirit with which it was intended.
West Bromwich Albion official statement: http://t.co/wgGDEopVdM
- West Bromwich Albion (@WBAFCofficial) March 8, 2015
"The club is also aware of reports of serious misbehaviour involving some of its own supporters. It issues an uncompromising reminder today that any supporter found guilty of disorder offences can expect the appropriate sanction from the club.
"West Bromwich Albion will continue to operate zero tolerance to any fans who bring the club's reputation into disrepute.
"The club also welcomes the FA investigation into the scenes and how they came about; West Bromwich Albion will co-operate fully.
"Pitch invasions cannot be tolerated under any circumstances. The safety of the club's players and staff during and at the end of the game was clearly compromised and that has to be a subject of deep concern for everyone involved."