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Police said 45-year-old Harley Flanagan slashed and bit two people Friday night during the CBGB Festival concert.

John Joseph, the band's lead singer, told NY1 one of the victims stabbed was the bass player.

He said Flanagan has a long history of causing trouble for the band.

The Cro-Mags were getting ready to take the stage when he got through security, according to Joseph.

"He was able to get in because somebody messed up and gave him a CBGBs Conference pass," Joseph said. "As soon as I heard that, I called up security and I said 'look, watch out for this dude.' So he came in there last night. And when you show up to a concert with a hunting knife, you're not showing up to cut some corn. You're coming in there to start trouble."

Webster Hall spokesman Heath Miller says Flanagan was carrying a small foldable knife and there was speculation he may have hidden it in a body cavity to elude security.

In a statement he said, "We do both wanding with a metal detector and part downs. The suspect was given a VIP credential by CBGB without our knowledge. That's how he got into the VIP area. But everyone is searched VIP or not."

A CBGB spokesman says responsibility for venue security is solely Webster Hall's responsibility.

Many musicians and fans arriving at Webster Hall Saturday night had not heard about the brief period of chaos less than 24 hours before.

"That's outrageous, totally outrageous. This is a place where you're supposed to have fun," said one music fan.

"We hope people mind their safety and be as cautious as possible especially if they think someone could cause an argument," said The Head band member Mike Shaw.

Flanagan is charged with assault and criminal possession of a weapon.

After the attack, the show was canceled and the club closed for the night.

Joseph promises the band will play a make-up show.