The famously factitious relationship between former Oasis members Liam and Noel Gallagher looks set to deteriorate further following reports that Noel has filed court documents accusing his younger brother of abusive and "irresponsible" behavior prior to the band's split in 2009.

The siblings' legal dispute dates back to August this year, when Liam filed a lawsuit against Noel following his claims that the singer had pulled out of a headline performance at the 2009 V Festival because of a hangover. Speaking at a London press conference to promote his debut solo release "Noel Gallagher's High Flying Birds," the former Oasis songwriter also stated that the band's break-up was partly related to Liam wanting to advertise his Pretty Green clothing line in the group's touring merchandise.

Noel later retracted his claims and apologized, leading -- or so it seemed -- to Liam withdrawing the legal action. Now it appears that Noel has filed a series of counter claims in response to the High Court libel action, with British tabloid newspaper the Mirror obtaining fresh legal documents that detail the reasons behind the multi-million selling band's split.

According to the Daily Mirror, the 14-page writ, which was lodged Nov. 1, contains a number of scathing accusations from the elder Gallagher including details of a backstage bust-up in Paris in 2009 where Liam was "physically violent" towards Noel.

"He went to his dressing room, fetched his guitar, and on returning began swinging the guitar around in the air like an axe, nearly smashing the defendant [Noel] in the face with it," the court papers go on to say. Noel is said to have regarded this incident as "the last straw" and quit the band that evening.

The papers also lodge claims that Liam left "offensive voicemail messages on the Defendant's [Noel] wife's mobile phone, insulting her and others the Defendant cared about."

One excerpt reads: "The claimant [Liam] had a history over the years of not only throat problems and of pursuing such an incompatible lifestyle, but of treating Oasis fans and the defendant with disrespect by disrupting gigs, including walking off stage, assaulting them and generally acting irresponsibly."

The court document goes on to list 12 separate occasions dating from 1994 to 2005 in which Liam allegedly "disrupted" gigs by storming out, being drunk or getting into fights, says the Mirror.

They reportedly include the claim that Liam head-butted a fan who asked for his autograph in Australia in 1998. Another incident cited by Noel's lawyers is his brother walking out of a three-week tour of America in 1996 to go house hunting.

Referencing the original libel filed by Liam in relation to the pulled show at 2009's V Festival, Noel admits that Liam did have laryngitis and medical certification to prove it. But his recovery was hampered by drinking and smoking until "at least 1am" the previous evening.

Noel also admits to saying that Pretty Green advertising would be included in Oasis' touring brochure "over my dead body," but says that he never spoke directly to his brother about the matter.

The legal documents also describe how Noel regarded his brother as "spiteful and childish" for dedicating songs onstage to Pretty Green employees.