The group took to Facebook.com to urge fans to look out for the expensive gear, which includes guitars, clothing, a keyboard and microphones.

The equipment was stolen from a van the group was sharing with U.S. punk rockers LA Drugz after a show in the city.

The post reads, "Some honourable gentleman broke into our van and stole ALL of our stuff in san francisco last night. If anyone sees any of our guitars floating around the city let us know. God bless the tweekers (sic) of san fran!... Attention San Francisco. Please repost! Fat White Family and LA Drugz van was broken into at the Travellodge on Market and Valencia last night. $20K or more in gear was stolen. Please keep your eye out at Oakland Coliseum Swapmeet and Mission area pawn shops..."