Detectives investigating allegations of election fraud in Bradford have arrested a second man.
The 51-year-old is being held by police as part of an inquiry launched last week following claims made against Conservative councillor Jamshed Khan.
A newspaper alleged that 13 people had applied for a postal vote at his Bradford home.
A 38-year-old man arrested on Tuesday has been released on bail pending further inquiries, a spokesman said.
Resigned whip
Mr Khan, a councillor in a Labour-held Parliamentary constituency in Bradford, insisted that claims of postal ballot fraud were false and said he would be "seeking legal advice".
But he resigned the Tory whip while the investigation was continuing.
The inquiry was started by police and the acting returning officer following claims made about the number of people registered at Mr Khan's home.
Meanwhile, a further 12 people had registered to vote at a derelict house which records show he co-owned until last year.
Mr Khan said this had "nothing to do with him" because he did not own the property.
West Yorkshire Police say they are looking into more than 100 postal ballots in the Bradford district as part of the investigation.