The cause of a major barn fire near Goderich remains under investigation.
640 pigs were killed Saturday morning when a barn east of Goderich went up in flames. Fire crews were called to the scene after a passer-by noticed the flames.
By the time firefighters arrived, the structure was fully engulfed and it took several hours for fire crews to extinguish the blaze.
The Fire Marshall is investigating.
Investigators say the fire is not believed to be suspicious, but damage is estimated at $1 million.