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CHICAGO — A man charged with stabbing two people during a punk rock concert at Northerly Island appeared in court for the first time Thursday.

A judge ordered Thomas Christensen to be held at the Cook County jail with bond set at $250,000.

Concert goers recall frightening moments at the Dropkick Murphy’s concert Tuesday on Northerly Island. A stabbing at a crowded concert is raising questions about how someone could sneak a weapon past metal detectors and security guards.

Reports said that it was a pocket knife in Christensen’s shoe.

Concert promoter “Live Nation” says it’s working with Chicago police to review security procedures.

Meantime, 34-year-old Christensen has been charged with one felony count of aggravated battery with the use of deadly weapon and one misdemeanor count of battery.

In court Thursday, prosecutors said Christensen got into a verbal argument with a 29-year-old man and 34-year-old woman at a a bar inside Huntington Bank Pavilion at Northerly Island.

The argument escalated and carried out into the concert venue where Christensen pulled out pocket knife and stabbed the man in the neck and face. One witness described the mayhem.

The woman suffered a cut to her abdomen.

They were taken to Northwestern Memorial Hospital where they were listed in serious and good conditions.

The public defender said Christensen has lived at the same home in Humboldt Park for three years. He attended college in Portland, Oregon.

His next court date was scheduled for August 15th, when we expect to learn more about what exactly led to this fight.