Things between Scott Weiland and his former bandmates in Stone Temple Pilots turned ugly on Friday.

First Weiland posted an open letter on his website saying that their performances last weekend with Linkin Park's Chester Bennington took him by surprise "and it hurt." Weiland went on to claim they had no legal right to call themselves STP because because, "I'm still a member of the band. And more importantly, they don't have the ethical right to call themselves Stone Temple Pilots because it's misleading and dishonest to the millions of fans that have followed us for so many years."

But in the same statement, he contradicted himself by saying, "So if my former bandmates want to tour with a new singer, that's their prerogative. I don't give a [crap] what they call themselves, but it's not Stone Temple Pilots."

Around the time Weiland statement's was posted, the three remaining members of STP filed suit against him in a Los Angeles court. The action claims the band owns the rights to the band's name, songs, copyrights and trademarks. They want a judge to block Weiland from performing STP songs -- or even billing himself as a former member.

The lawsuit accuses Weiland of interacting with the band only through lawyers or managers and showing up late to the group's 2012 shows, causing a drag on their ability to earn income. The lawsuit also claims that Weiland's lawyer called the head of programming at a Los Angeles modern rock station and said if the station played "Out of Time," the new single with Bennington on vocals, it would be infringing on Weiland's rights.

The lawsuit also says, "Enough is enough. Without relief from the court, Weiland will continue violating STP's rights, misappropriating STP assets and interfering with the band's livelihood." It refers to agreements reached in 1996 and 2010 that bar former members from using the Stone Temple Pilots name.