Extra security will be in place tomorrow as the Baggies face the Potters in a Midland derby after a series of incidents involving smoke bombs being set off in football grounds.
Police have urged Baggies fans hoping to travel to Stoke-on-Trent to watch their club take on the Potters not to travel unless they already have tickets.
Officers say there have been a "number" of recent incidents were supporters have let off smoke bombs, flares and fireworks at football stadiums in recent weeks, and said ticketless fans will not be allowed into the grounds.
West Midlands Police's match commander Ch Insp Carl Ratcliffe said "thorough" searches would be carried out tomorrow ahead of the 3pm kick-off.
“There have been a number of incidents nationally in recent weeks where smoke bombs/flares and other firework type explosives have been let off by supporters and I want to warn people against this type of behaviour," he said.
“We are working closely with the club and will be carrying out a through search operation and anyone found in possession of such items will be arrested.
“Our joint aim is to ensure the safety of all supporters so everyone can have an enjoyable time."