New Delhi  - Indian doctor Sabeel Ahmed, brother of Kafeel Ahmed who died in a suicide car bomb attack on Glasgow airport, was deported to India and returned to his home in the southern city of Bangalore on Thursday.

Twenty-six-year-old Sabeel pleaded guilty at London's Old Bailey last month to withholding information about his elder brother's plot to blow up the Glasgow airport.

He was given an 18-month sentence but was released for deportation because of the time spent in remand during the trial.

Sabeel, who arrived at the Bangalore airport by a British Airways flight in the early hours of Thursday, was whisked away from the airport by security personnel through another exit to avoid the media.

Sabeel's mother, Zakia Ahmed, a retired doctor, told media personnel waiting outside their house in the Banashankari area that he was reluctant to speak to them.

"He does not wish to say anything... He has travelled the whole night and has not slept. He is now taking rest, please leave him alone so he can recover," she told reporters.

"I will try my best to convince him to speak to the media. It may take a couple of days," she added.

Sabeel had admitted to not disclosing to the police an email which his brother wrote about the details of the attack.

Sabeel was arrested soon after Kafeel, who had a PhD in engineering, drove a burning Cherokee Jeep into the terminal building at Glasgow airport on June 30 last year.

Kafeel, who suffered burns to over 90 per cent of his body, died at a Glasgow hospital on August 2. (dpa)