A passerby first noticed a fallen wall at the Empire Hotel on Simpson Street in Thunder Bay. The building is vacant, but is now being watched around the clock until officials decide what to do next. (Matt Prokopchuk/CBC)

The abandoned Empire Hotel on Simpson Street attracted some curious onlookers Wednesday, after part of the building's back wall collapsed the night before.

Passerby Guido Benvenuto said he wants to see the rest of the structure demolished.

"To have it actually collapse at this point is a danger in itself as far as I'm concerned,"  Benvenuto told the CBC.

"I'd like to see the city take this building down as soon as possible ... there's no reason for this at all."

Thunder Bay Fire and Rescue cordoned off the former hotel after a large section of the rear wall collapsed between 7:30-8 p.m. Tuesday.

The building is vacant and no one was hurt, but acting platoon chief Dan Hyvarinen said the building is still a safety risk.

"It was reported in by a passer-by that a portion of the rear of the building had collapsed," said Hyvarinen. "Crews [went] on site and the area was barricaded off."

Security staff have been watching the building as officials determine what to do next — with a decision likely to come sometime on Wednesday.

Simpson Street is still open to traffic.