Classes have finally resumed for students of a northern New Jersey charter school that was shuttered after it was severely damaged by fire earlier this month.

The Hoboken Charter School welcomed back its 200 students on Tuesday. The K-8 school has temporarily moved its operations to a vacant school in nearby Jersey City, and it's not known when -- or if -- they will be able to return to their former building.

Seven firefighters were injured while battling the three-alarm fire that erupted at the charter school on Sept. 6. It's still not clear what sparked the blaze, which started on the second floor of the four-story charter school building.

School officials say that one of the first things they did Tuesday was hold a fire drill.

(Copyright 2012 by The Associated Press.  All Rights Reserved.)