Iranian Celebrities Fan Flames of Anti-Regime Protests

Headline says celebrities inside and out of Iran are taking part in anti-regime protests. But the expression that we are looking at is fan flames, or fully, fan the flames of something. If you light a fire, let's say a barbecue, and you want to make the flames more intense, you can fan the flames and they get stronger. So generally speaking,fan the flames is an expression used metaphorically. And it usually means to make a tense situation even more tense.