32 treated after carbon monoxide forces evacuation of NYC building

— -- At least 32 people in New York City were evaluated this morning after a building in the Tribeca neighborhood was found to have elevated levels of carbon monoxide, officials said.

Firefighters responded to 60 Murray St. where a defective oil burner caused a 2-alarm fire in the basement of the 12-story building, according to the New York City Fire Department.

Residents evacuated the building, which was found to have high readings of the deadly gas throughout, the FDNY said on Twitter.

Only one person is believed to have been seriously injured and was taken to the hospital, ABC New York station WABC-TV reported. The remainder of the victims were treated on site as a precaution.

Police do not believe the fire to be suspicious or nefarious, the New York City Police Department said. Firefighters are investigating adjacent buildings as well, the FDNY said.

People inside the building told officials that they became sick after opening a box that contained powder inside, according to the FDNY. After the package was located, the NYPD bomb squad determined that it was not a hazard.

The box contained salad bowls and had been delivered on Monday, WABC reported.

ABC News' Aaron Katersky contributed to this report.