Firefighters are battling a large fire at a building on a potato farm outside of Shelburne.
Crews were called to the scene around 1:30 a.m.
The Mulmur-Melancthon Fire Department is being assisted by Clearview, Adjala-Tosorontio and Rosemont District Fire Departments.
The OPP have closed the Mulmur-Melancthon townline between County Rd 21 and 30th Sideroad.
No reports of injuries at this time.