MANAUS, Brazil -- World Cup organizers hoped skirmishes would be limited to protests in the streets.
Until Monday, that appeared to be the case until a decent-sized brouhaha broke out in Recife's Arena Pernambuco.
To set the scene, an elimination match between Mexico and Croatia quickly turned into a 3-1 Mexican rout late in the second half -- a result that eliminated the Croatians from contention.
So, soccer hooligans here in Brazil did what soccer hooligans do: They started mixing it up.
Both Croatian and Mexican fans have a history of starting disturbances in and around soccer stadiums, making it even more bizarre that the stadium in Recife appeared to have limited security measures in place to handle the disturbance.
Tournament officials took immense scrutiny last week after security measures at the Maracana stadium in Rio de Janeiro were breached multiple times by Argentine and Chilean fans, who rushed the venue in an attempt to see a match.
Here in Manaus, however, security measures couldn't be tighter.
On my way into Arena Amazonia this week, my bag was checked three times, the first of which occurred at a military perimeter that began more than a kilometer away from the stadium.