UPDATE, 5:17 p.m.: The Sudbury Building Inspector and Wiring Inspector have been called to the scene, accordng to scanner reports.

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UPDATE, 5:15 p.m.: The fire has been declared "under control," and knocked down, according to scanner reports.

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UPDATE, 5:13 p.m.: The fire has reached the second floor of the 2.5 story house, according to a Breaking News Network alert. 

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UPDATE, 5:07 p.m.: Weston firefighters have been called to cover for Sudbury firefighters as they fight the house fire, according to scanner reports.

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UPDATE, 4:50 p.m.: A second alarm has been struck for the fire and Concord and Framingham firefighters have been called to the scene for assistance, according to scanner reports.

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Sudbury firefighters are working to knock down a fire at 4 Stagecoach Drive, according to Twitter and scanner reports. 

Firefighters found smoke coming from the home upon arriving at the scene. 

Stay tuned to Sudbury Patch for updates.