Firefighters evacuated downtown's New Medford Apartments for about 30 minutes tonight while they find the source of apparent light smoke that turned out to be discharge from a fire extinguisher, firefighters say.

Firefighters evacuated downtown's New Medford Apartments for about 30 minutes tonight while they find the source of apparent light smoke that turned out to be discharge from a fire extinguisher, firefighters say.

The apparent smoke was discovered on the third floor of the six-floor apartment building and former Medford Hotel on the 400 block of West Main Street, says Medford Fire-Rescue Battalion Chief Ken Goodson at the scene.

Crews then went door to door while five engines stood by at the scene in case something broke out, Goodson says.

Residents were mulling around in the gold evening air while no signs of smoke or flames could be seen from the street. One engine blocked the middle lane of West Main Street during the inspection.

Inspectors determined that someone shot off a fire extinguisher that created a dust cloud that looked like smoke, Goodson says.

Residents returned to their apartments around 8 p.m.

— Mark Freeman