Three people have been injured

woman with an apparent vendetta against YouTube has shot and injured three people at its California HQ before turning the gun on herself.

Her dad says he warned police she could be heading to the site near San Francisco because she hated the firm.

She's been named as Nasim Aghdam - an animal rights activist who had several channels on the site.

But she'd complained her videos were being filtered and relegated so people could hardly see them.