News12 New York
N12 Originals
Numbers & Links
Local
Crime
Weather
Politics
Sunny
63°
Local
Crime
Weather
Politics
Image

Carbon monoxide alarm prompts evacuation and early dismissal at Ossining High School

Ossining police said a carbon monoxide detector went off inside the building, but officials found no carbon monoxide levels during their investigation.

News 12 Staff

•

Oct 21, 2026, 11:40 AM

•

Updated

Share:

More Stories

Students were evacuated from Ossining High School Wednesday morning after a carbon monoxide alarm sounded, prompting a response from police, firefighters and emergency crews.

Officials said the call came in around 9:41 a.m. Police later determined no carbon monoxide was present in the building.

Authorities said the alarm was triggered during construction work when a contractor’s saw activated the detector.

Students were moved outside while crews investigated the alarm. School officials ultimately decided to implement an early dismissal.

Three students were evaluated as a precaution, but officials said no injuries were reported.

More From News12

App StoreGoogle Play Store

info

Newsletter

Send Photos/Videos

Contact

About Us

News Team

News 12 New York

follow us

Twitter

Facebook

Instagram

more resources

Optimum Corporate

Optimum Service

Advertise on News 12

Careers

Content Removal Policy

© 2026 N12N, LLC

Privacy Policy

Terms of Service

Ad Choices