"The Joint Investigation Team (JIT) will complete probe into Pathankot incident this week," Prime Minister's Special Assistant on Foreign Affairs Syed Tariq Fatemi was quoted as saying by Radio Pakistan.
Pakistan last week set up a five-member JIT to probe the terror attack on the Pathankot airbase, a week after it lodged an FIR over the assault without naming Jaish-e-Mohammed (JeM) chief Masood Azhar who India has accused of having masterminded the strike.
Three men arrested for their alleged role in the attack were sent to a six-day police remand by an anti-terrorism court in Gujranwala city of Punjab on Saturday.
The FIR by the Counter-Terrorism Department of Punjab police has been lodged on the basis of information provided by National Security Adviser Ajit Doval that four attackers crossed from Pakistan into India and attacked the airbase.
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The attack led to the postponement of a scheduled meeting between Foreign Secretaries of Pakistan and India in January in Islamabad. Since then, no date has been fixed for the talks.
He said Prime Minister Narendra Modi is also expected to attend the summit.