Firefighters battle a fully engulfed garage in the rear of...

Firefighters battle a fully engulfed garage in the rear of a Medford insurance company early Sunday, Feb. 11, 2018. The cause of the blaze is under investigation. Credit: Bryan Lopez

Authorities are investigating the cause of a fire that broke out early Sunday in a Medford garage behind an insurance company office, a Suffolk County Fire Communications spokesman said.

There were no injuries.

The spokesman said the blaze started at about 3:45 a.m. Sunday in the back of the Rvi Insurance office on Route 112.

“It was a fully involved garage fire,” the spokesman said.

No other information was immediately available.

On the latest episode of "Sarra Sounds Off," the Suffolk Hall of Fame class of 2026, former NFL Quarterback Mike Buck and Jared Valluzzi has the plays of the week. Credit: Newsday Credit: Newsday

Sarra Sounds Off: Suffolk Hall of Fame Class of 2026 On the latest episode of "Sarra Sounds Off," the Suffolk Hall of Fame class of 2026, former NFL Quarterback Mike Buck and Jared Valluzzi has the plays of the week. Credit: Newsday

On the latest episode of "Sarra Sounds Off," the Suffolk Hall of Fame class of 2026, former NFL Quarterback Mike Buck and Jared Valluzzi has the plays of the week. Credit: Newsday Credit: Newsday

Sarra Sounds Off: Suffolk Hall of Fame Class of 2026 On the latest episode of "Sarra Sounds Off," the Suffolk Hall of Fame class of 2026, former NFL Quarterback Mike Buck and Jared Valluzzi has the plays of the week. Credit: Newsday

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