A sixth man has been arrested following the BBC documentary about the British National Party.
The 23-year-old, from Bradford, was questioned on suspicion of racially aggravated threatening behaviour.
A West Yorkshire Police spokeswoman said he was released on police bail on Wednesday. It brings the total number of men arrested in the inquiry to six.
Police say they have been released on bail to allow sufficient time for an investigation to be carried out.
The earlier arrests came after the BBC1 documentary Secret Agent featuring an undercover reporter attending BNP meetings, was screened last week.
One 51-year-old man was questioned about racially aggravated harassment, another, aged 45, was held on suspicion of possessing a firearm and a third, aged 23, was questioned about public order offences.
Two men, aged 35 and 40, were arrested on suspicion of conspiracy to commit criminal damage.