Though UK immigration cleared Ramdev and allowed him to carry on with his programmes in Britain, the yoga guru said he was not given any reason for his detention yesterday.
According to sources, his questioning by airport officials was related to him travelling on a visitor's visa instead of a business one.
Ramdev arrived at Heathrow Airport this evening with British Indian MP Keith Vaz to meet the chief immigration officer.
Emerging from the nearly 20-minute meeting, Ramdev claimed the Indian government may have had a hand in his detention.
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"I'm sad to say that our government did not support us. I'll wait for all the details but what happened indicates that the UK authorities may have been misguided by the Indian government. I believe a red alert was attached to my name," Ramdev said.
Earlier, the yoga guru told reporters he had "never done anything unethical or wrong". He said, "I have been travelling to the UK and the US for eight years and I have never been treated the way I have been treated this time.
Ramdev further said he had followed all rules and visa conditions of the British government. "I would only expect that the way we respect the UK, they will show India and Indians the same respect. I'll accept whatever they decide."
He is in Britain to chair a series of 'yoga shivirs' and talks organised by the Patanjali Yog Peeth (UK) Trust.
The UK Home Office refused to comment on what it described as an individual's questioning over immigration issues.
Ramdev's spokesperson S K Tejarawala dismissed reports that he was detained for carrying some medicines. "He was not carrying anything with him except a small bag of personal effects. It is for the British authorities to explain why he was detained," he said.