The police have recovered handmade maps of Dehradun and Meerut cantonments, documents containing details of weapons and the cellphone, which he was using to contact ISI officers.

Additional SP STF, Rahul Raj, who led the operation, said Amir (24) a native of Saharanpur district, had been in constant touch with Karachi-based ISI officer Farookh alias Tayyab since 2007.

The youth had last visited Karachi in 2008 and undergone extensive training in collecting intelligence about the Indian Army. Amir was on the ISI payroll, Rahul Raj said.

The ASP also said that Amir had first visited Pakistan after he got a passport from the Bareilly Passport Office in 1998. He had mentioned his name as Bhura Ahmed in the passport in which he has given his genuine address.

The passport was yet to be recovered by the police. He has been to Pakistan five times since, on the pretext of visiting his sister in Karachi. He had come in contact of an ISI agent Wasim in 2007 who had introduced him to Tayyab, said the ASP.