Nigerian singer, Peter Okoye, aka Mr P, has slammed his twin brother, Paul Okoye, aka RudeBoy, in an open letter over repeated remarks that undermined his contributions to the defunct P-Square group.

The ace singer shared the emotion-ridden letter on his Instagram page, accusing Paul of constantly discrediting his contributions to P-Square, a group they co-founded and nurtured to stardom.

The letter read in part: "My dear brother Paul, just like I have told you several times, I am not in any competition with you or anybody else.

"However, seeing you grant countless interviews where you constantly discredit my efforts in the group that we both created and built together really speaks volumes.

"In your recent interviews, you claimed that you wrote and sang 99 percent of all P-SQUARE songs and discredited me by saying that our song with TI "EjeaJo," which I wrote, was a failure.

"You never acknowledged the other songs like "Get-Squared," "Bizzy Body," "Personally," "Roll It," "Temptation," "Alingo," "More than a Friend," "Shekini," "Say Your Love," "Gimme Dat," "Senorita," "IGBEdu," and a few others.

"Were these songs also considered failures as well? We both have talent, no doubt, and I have often praised you in our interviews for your songwriting ability.

"But instead of showing gratitude for my kind words, you seem to find satisfaction in rubbing it in my face, forgetting that it is by God's grace that we have come this far.

"Rather than joining forces with me to reclaim our number 1 spot in the music industry, you chose to team up with Jude to claim the number 1 spot in the P-SQUARE group.

"You always look for opportunities to marginalize and humiliate me. You are always claiming to be P-SQUARE's songwriter, composer, producer, singer, backup vocalist, in fact you are everything including P-SQUARE's video director, band, promoter, manager, even the choreographer.