The Delhi Police has arrested a 59-year-old man for his alleged involvement in espionage activities, including links with foreign-based nuclear scientist, and a fake passport racket operating from Jamshedpur in Jharkhand, an official said on Tuesday.The accused, identified as Mohammad Adil Hussaini and also known by the names Syed Adil Hussain, Nasimuddin and Syed Adil Hussaini, was apprehended from Seemapuri in Delhi two days ago,.Police said that the accused was also in touch with a nuclear scientist based abroad.Adil and his brother Akhtar Hussaini are suspected of supplying sensitive information to foreign countries and procuring multiple Indian passports using forged documents,. The entire network was allegedly being operated from Jamshedpur, where fake identity cards and passports were being prepared with the help of counterfeit documents.During the search, police seized one original and two forged passports.