George Galloway has been "detained" at Gatwick Airport, his party has said.
The former MP and his wife were reportedly stopped at the airport today by counter terrorism officers.
The Workers Party of Britain, led by Mr Galloway, branded it "politically motivated intimidation" and demanded for their immediate release.
The pair were ultimately not arrested and allowed on their way.
In a post to X, the Workers Party of Britain said: "At 11am we were informed by police officers in Gatwick that our party leader George Galloway and his wife have been detained at the airport."
It added: "Despite repeated attempts to gather further information, and despite repeated calls to the police, we have no further information on their wellbeing, nor on the observation of their rights.
"There is no information on charges or alleged offences. Therefore we may conclude this is politically motivated intimidation.
"We call on all supporters and friends to amplify this message and demand the IMMEDIATE RELEASE of our leaders."
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Former MP George Galloway was detained at Gatwick Airport today
| PAThe Met Police confirmed it had stopped a man and a woman under schedule three of the Counter Terrorism and Border Security Act, which gives officers powers to stop, question and detain people to determine if they have engaged in hostile activity.
A force spokesman said: “We can confirm that on Saturday, counter-terrorism officers at Gatwick airport stopped a man in his 70s and a woman in her 40s under schedule three of the Counter Terrorism and Border Security Act 2019.
“Neither of them were arrested and they were allowed on their way."
Mr Galloway stood as Workers Party of Britain MP for Rochdale in 2024.
He however lost his seat in Parliament just weeks after being elected.
The 71-year-old appeared as a contestant on Celebrity Big Brother in 2006.
It was revealed last year that Andrew Tate's brother, Tristan, had donated thousands of pounds to an online fundraiser set up to help fund the Worker's Party campaign.
George Galloway was elected as MP for Rochdale in 2024 but lost his seat weeks later
|PA
Mr Tate pledged £5,000 over two instalments to the fundraiser, shortly after the UK General Election was announced.