One of Nigeria’s top banks, the United Bank of Africa is alleged to have played a role in the failed military coup in Turkey, Yeni Safak daily has reported.

The Turkish daily known for its loyal support of Turkish President Recep Tayyip Erdogan, who was the target of the coup attempt said a former commander of NATO forces in Afghanistan, retired US Army General John F. Campbell, was the mastermind of the failed coup.

The daily said Campbell “managed more than $2 billion in transactions via UBA in Nigeria by using CIA links to distribute among the pro-coup military personnel in Turkey.”

“The Nigeria branch of the United Bank of Africa (UBA) was the main base for the last six-months of money transactions for the coup plotters,” the conservative paper’s English-language edition said on Monday.

According to the paper, “Millions of dollars of money has been transferred from Nigeria to Turkey by a group of CIA personnel. The money, which has been distributed to an 80-person special team of the CIA, was used to convince pro-coup generals. After taking money from their bank accounts, the CIA team hand-delivered it to the terrorists under the military dresses.”

More than 2 billion dollars all allegedly wired through the Nigerian branch of UBA is said to have been distributed during the process leading to the coup.

“The money transactions were started in March 2015 through the commissioned “courier”, the paper said.

Quoting sources close to ongoing legal process of pro-coup detainees, the paper said ongoing investigation unveiled that Campbell had paid at least two secret visits to Turkey since May, until the day of the coup attempt.

The retired US general had allegedly paid “at least two secret visits” to Turkey since May up to the attempted coup, which the Turkish authorities blamed on what they call the Fethullah Terrorist Organization (FETO).

American Intelligence, Military and other institutions are accused of supporting the FETO leader Gülen and his gangs for the military coup.