UPDATE, 5:17 p.m.: The Sudbury Building Inspector and Wiring Inspector have been called to the scene, accordng to scanner reports.
UPDATE, 5:15 p.m.: The fire has been declared "under control," and knocked down, according to scanner reports.
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.
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.
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.
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.