A man was critically injured in an altercation with a bouncer inside a downtown Minneapolis bar over the weekend, police said Monday.

The nightspot's security guard is now in jail following the incident around 2 a.m. on Saturday at the Saloon, a gay bar on the corner of Hennepin Avenue and 9th Street. The 27-year-old man who had been stabbed was taken by emergency medical responders to a hospital with critical injuries.

The wounded man's identity has yet to be released, and police have yet to disclose the circumstances leading up to the stabbing.

The bouncer, a 33-year-old man from Newport, was also treated at the hospital for injuries, then booked into the Hennepin County jail on suspicion of first-degree assault. The Star Tribune generally does not identify suspects before they are charged. Court records in Maryland show the man was convicted of second-degree assault in 2009 in Baltimore County.

The Saloon's CEO, Christopher Bock, said of the suspect and the wounded man: "I'm still trying to figure out if they knew each other and how they knew each other."

Bock said that video surveillance from inside the bar offered "not very good angles" of the altercation.

"Nightclubs are tough," Bock said. "A lot of things happen. … For New Year's Eve, we're going to double down and bring in private security to add a couple more guys to the roster."