Salim Munir Khan alias Abu Amaar alias Arif, a native of Hathgaon in Fatehpur district of Uttar Pradesh, was facing a lookout notice. He was arrested from the international airport on the intervening night of July 16 and 17, he said.
Salim was deported from Abu Dhabi by the United Arab Emirates authorities as he did not possess valid documents to support his stay in the Gulf country, said the police official in Mumbai on condition of anonymity.
According to the official, Salim, who left India in 2007, had played an important role in facilitating the "suicide" attack on a CRPF camp in Rampur, Uttar Pradesh, on January 1, 2008.
Eight people, including some CRPF jawans, had been killed in the terror strike.
Indian law enforcement agencies, who were looking for him, had got information about his whereabouts and alerted the Maharashtra and Uttar Pradesh Police, he said.
Personnel from Anti-Terrorism Squads of Maharashtra and Uttar Pradesh were at the airport when Salim landed, the official said.
Arun said two people, Kausar and Shareef, arrested in connection with the attack on CRPF camp, had told the UP police that Salim had got training with them at a terror camp in Muzaffarabad in Pakistan-occupied Kashmir in 2007.
While being abroad, Salim had been in contact with Aftab and gave instructions to him about terror activities and funding, the official in Mumbai said.
UP ATS and Maharashtra police are interrogating Salim Khan in Mumbai, Arun added.
In Mumbai, the police said the UP ATS will seek Salim's custody for questioning in the Rampur attack and alleged involvement in several other anti-national activities under their jurisdiction.
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