SEATTLE, WA - SEPTEMBER 15: Colin Kaepernick #7 of the San Francisco 49ers looks on as Richard Sherman #25 and D'Anthony Smith #94 of the Seattle Seahawks celebrate a saftey during their game at Qwest Field on September 15, 2013 in Seattle, Washington. (Photo by Jonathan Ferrey/Getty Images)
Football fans at Sunday's home game against San Francisco 49ers' rival the Seattle Seahawks are advised to keep their hands to themselves with many undercover police officers expected to be in the stadium.
San Francisco police Chief Greg Suhr said Friday "we want to be class fans" at the sold-out game at Candlestick Park. Kickoff is at 1:25 p.m.
To keep the crowd in check, Suhr said officers will be wearing Seahawks gear, and for this game there will be more decoy fans than at any other game. The chief declined to specify the number of undercover officers.
The chief advised that a Seattle fan "could well be a San Francisco police officer" and that game attendees stay away from fights and arguments.