Toronto Blue Jays fans celebrate after the team beat the Seattle Mariners on Monday to win the American League Championship Series, in Toronto.

The return of the World Series to Toronto on Friday will be met with increased security measures, say police, who are preparing to counter a complex array of threats that security experts say could include terror attacks, riots or drones.

Toronto Police Chief Superintendent Frank Barredo, the force’s head of public safety operations, said he is working with police forces from across the Toronto area to enforce drone no-fly zones and consider some road closings. He also said authorities are putting physical barriers outside the Rogers Centre and deploying more officers in and around the stadium.

“As the games have moved into the World Series, t

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