The iconic Pink Triangle on Twin Peaks was set on fire by possible vandals at around 5 a.m. this morning, damaging a 25-by-30 foot area. The fire was extinguished thirty minutes later. Arson investigators are still trying to determine the cause. Mark Leno told CBS5 (video) that this isn't the first time it's happened, and that it will be repaired in time for next year's pride weekend. As Leno explained, the Pink Triangle is highly visible and vulnerable. In CBS5's video report about the incident, a resident mentions that there are lots of rare plants on Twin Peaks that were likely damaged. On a side note, some of NBC Bay Area's commenters are ignoramuses.