First Avenue will stay closed until the plaster ceiling at the nightclub is fixed following a partial collapse that sent three people to the hospital.
No cause for the collapse had been announced as of late Thursday and officials said they may never be able to determine why a portion of the ceiling fell down during a Wednesday night concert.
"Frankly, I'm not sure that anybody will ever be able to come in and just pinpoint 100 percent here's what happened," First Avenue general manager Nate Kranz said Thursday. "It's extremely unfortunate and kind of a freak accident."
About a 30-by-30-foot section of the ceiling gave way during a concert around 10 p.m. Wednesday, the Minneapolis Fire Department said. Three people were injured and went to Hennepin County Medical Center. None of the injuries appeared to be life-threatening.
The damage was limited to the performance area of the club. The adjoining restaurant will be allowed to open once the fire sprinkler system can be restored, city officials said.
Plans are for the ceiling in the music venue to be demolished and a damaged sprinkler system to be repaired, city officials said. The city will inspect all of the fixes before the club is reopened to the public, said Patrick Higgins, a building official with the city.
The city issued a demolition permit to begin work on the ceiling Thursday. Minneapolis building inspectors as well as insurance representatives were on site at First Avenue throughout the day. The ceiling, which dates to 1936, was being tested for asbestos before demolition could begin, Kranz said. Equipment inside the venue was moved to prevent damage, he said.
No cause as yet
An engineer who visited the site could not find the exact cause of the collapse, but it was determined that there was not any immediate danger such as structural damage to the building, Kranz said.