For the second time this weekend, an LGBTQ+ event was targeted by guys tied to a hate group, according to law authorities.

The San Lorenzo Library, roughly 25 miles southeast of San Francisco, was disrupted on Saturday afternoon, prompting the Alameda County Sheriff's Office to start a hate crime investigation.

The males wore attire and slogans associated with the Proud Boys, a white supremacist group involved to the violent siege at the US Capitol on January 6, according to the office.

"DQSH captures the fantasy and play of gender fluidity in children and gives kids attractive, positive, and shamelessly queer role models," the organisers write on their website.