In an operation with City of London Police, the organisation executed search warrants at one home in Surrey and another two in Essex.
Three men – aged 33, 41 and 47 – have been taken to a London police station for interview connected to the investigation of the manipulation of the interbank lending rate.
All of the arrested men are British nationals living in the UK, a statement by the SFO added.
The SFO decided to launch a formal investigation into Libor in July. The body said existing legislation is capable of bringing potential prosecutions for the manipulation of Libor and related interest rates.
It was not revealed which bank or banks the arrested men worked for. Around 20 financial institutions across the globe are being investigated for the alleged roles in the scandal.
Barclays is the only bank to have been fined so far over the Libor scandal after paying £290m to global regulators including the FSA. The scandal also prompted the resignation of Bob Diamond, the bank’s chief executive.
