MINNEAPOLIS (AP) -— Workers at the Metrodome have intentionally ruptured another panel in the building's damaged roof.

Pat Milan, a spokesman for the commission that runs the Dome, says a shotgun slug was fired into the panel because the weight of ice was creating a safety issue.

It's the fifth panel that has torn or been torn since a winter storm caused the roof to give way eight days ago.

Milan says engineers are watching some other panels that might need the same treatment to keep workers safe.

Milan says the commission hopes to know more about a timetable for repairing the roof by the time it meets Wednesday morning. The roof failure has forced the Vikings to play the Bears Monday night at TCF Bank Stadium.

Copyright 2010 The Associated Press.