The suspect works as a constable at the Vehari Police Patrol.
Interior ministry officials were reported to have received threats through calls and messages from an unidentified number after the Rawalpindi and Karachi blasts that took place on November 21.
Interior Minister Rehman Malik had revealed during a press conference that he and his officers received death threats through text messages. He had told the media that security officials have traced the sender.
The government has increased security across Pakistan since Muharram began.
Malik had ordered bans on riding motorcycles, pillion riding and cellular services in different parts of the country.
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