Boston's Irish-punk band Dropkick Murphys didn't waste any time with a concertgoer last week in New York City, attacking him onstage after he gave a Nazi salute.

In videos posted on YouTube from various attendees bassist/singer Ken Casey and the band were playing New York's Terminal 5 when the incident took place. Approximate one minute and 30 seconds into the YouTube clip above, Casey looks across the stage filled with fans to see a male saluting on the other side of the stage. "Here it comes... watch bass player," a statement reads on the clip.

Casey walks across the stage and grabs the skinhead by the throat, causing the guy to fall to the stage. The bassist then removes his bass guitar and swings it down on the male before roadies and others intervene as the band continues playing a cover of AC/DC's 'T.N.T.'

"Holy shit! Do you see what's going on here," somebody says on the microphone before Casey, gasping a bit for air after the altercation, says what is now obvious. "Alright, Nazis are not f--king welcome at a Dropkick Murphys show!"

The group carried on the show without any further incidents. Ironically, the band's had just finished playing 'Skinhead On The MBTA' which appeared on their 1998 album "Due Or Die."

The band made no mention of what transpired on its official site, nor through its Facebook or Twitter accounts. The group, who released a new studio album "Signed And Sealed In Blood" earlier this year, will start an Australian tour later this month before returning to the U.S. for another leg, including a stop at this year's Coachella.