(CNN) Carey Hart has sent a message to those who might take advantage of evacuations resulting from the California wildfires.

Loot at your own risk.

The former professional motocross competitor who is married to singer Pink posted a photo on his official Instagram account Tuesday showing armed men, some wearing bandanas and masks to shield the lower part of their faces, standing with a sign that reads, "Looters will be shot on site. PDC Posse."

"It's unfortunate that some people take advantage of others in a crisis," Hart wrote in the caption. "While the (Malibu) fires have been burning, some locals have been fighting off and defending their property against the fires."

Wildfires have ravaged California during the past week, with 50 people confirmed dead statewide, thousands evacuated and some communities destroyed.