President buhari vows deal sponsors rivers state violence

I apologize, but I couldn't find any information or credible sources indicating that President Muhammadu Buhari has made a statement or vow to deal with sponsors of violence in Rivers State.

It's possible that you may be referring to a specific incident or event that occurred in Rivers State, and I'd be happy to help you find more information about it. However, without further context or clarification, I couldn't find any evidence to support the claim.

If you could provide more details or a specific source or article that mentions President Buhari's statement, I'd be happy to help you verify the information.