The vicious fight between OASIS brothers NOEL and LIAM GALLAGHER that ripped the band apart on Friday (28Aug09) was sparked by an argument over the frontman’s drinking, according to U.K. reports.

Guitarist Noel sensationally quit the band after a ferocious bust-up with singer Liam just minutes before they were due onstage at a music festival in France.

The star subsequently came out and blamed his brother for his decision to leave, insisting life in the band had become “intolerable.”

Noel also mentioned the band’s axed headline slot at the V Festival in Chelmsford, England last Sunday (23Aug09), hinting the cancellation was not down to Liam’s throat virus, as had been previously claimed.

He wrote, “I can only apologise – although I don’t know why, it was nothing to do with me. I was match fit and ready to be brilliant. Alas, other people in the group weren’t up to it.”

Now new reports claim Liam’s boozing became an issue between brothers throughout their U.S. tour this year (09) and sparked the final fight in France after the frontman allegedly turned up to the gig drunk.

A source tells British newspaper The Sun, “Liam has been drinking heavily for the duration of the tour and regularly got very abusive and personal. He has taunted Noel’s girlfriend Sara, other band members, and the crew. People have been frightened to go near him. He is one very angry man who needs to sort his issues out.”