tourist cops samuel kvarzell , markus asberg , eric jansberger and erik naslund broke up a fight on the uptown 6 train this wednesday .
` here as tourists , they stepped up , ` bratton said on friday .
the friends were on their way to see les misérables on broadway when a conductor on the 6 train called for help .
the men , who are all police officers in their native sweden , wrestled the suspect to the floor and held him until nypd could arrive .
` we 're no heroes , just tourists , ' says uppsala , sweden , police officer .