The Times of India said Indian national Kafeel Ahmed, an aeronautical engineer with a doctorate from Britain, was one of the men detained after driving a blazing car into Glasgow airport.
He is currently being treated for serious burns.
"I am involved in a large-scale confidential project. It is about global warming. I cannot reveal the details," he told his family in Bangalore, southern India, before leaving for Britain in May, the Times of India reported.
"It involves a lot of travelling ... the project has to be started in the United Kingdom," he was quoted as saying.
"Various people from various countries are involved in this."
On June 30 - the day after two car bombs in London were discovered and defused and just prior to the Glasgow attack - Ahmed told his family in India that his "earlier presentation failed" and asked them to pray for him, the paper said.
"Presentation"? I've had a PowerPoint presentation blow up in my face before, but I didn't require hospitalization... and there may have been loss of a sale, but never loss of innocent lives.