POLICE and Department of Fire and Emergency Services were called to a fire at a warehouse on Pilbara Street in Welshpool about 10.25pm last night .
Arson Squad detectives attended the scene this morning and to date the cause of the fire is being treated as suspicious.
The fire caused extensive damage to the building and the cost is estimated at between $1 million and $2 million.
Anyone with information regarding this fire, or who saw anyone acting suspiciously in the area at the time, can call Crime Stoppers on 1800 333 000 or report it online at www.crimestopperswa.com.au.
Rewards of up to $50,000 are available for information that leads to the identification and conviction of an arsonist.