The LIBOR rate probe has turned its focus to Crédit Agricole, HSBC, Deustche Bank and Société Générale, reports Financial Times.

Sources told the paper, “[There is] evidence of links between traders at all four banks and Barclays’ former euroswaps trader Philippe Moryoussef is under scrutiny.”

Read: Barclays’ Diamond talks tough

Barclays ex-chief executive Bob Diamond resigned earlier this month after the bank was fined $453 million by U.S. and U.K. agencies for making false reports of its borrowing costs between 2005 and 2009.

Read: Barclays to pay $400M+ to settle rate manipulation charges