Police arrested several dozen people and fired non-lethal projectiles to disperse an unruly crowd on Saturday after a dueling protest over transgender rights at a Los Angeles spa turned violent. The protests stemmed from a video that circulated online earlier this month, in which an irate customer complained to the staff at Wi Spa about a transgender woman’s exposed genitalia in the women’s section of the spa. Police declared an unlawful assembly in front of the spa in Koreatown around 11 a.m. when demonstrators against transgender access to the spa’s facilities clashed with counter protesters and some in the crowd threw smoke bombs and other objects at officers, Det. Meghan Aguilar, a spokeswoman for the LAPD, said.