Jailed former prime minister Imran Khan was on Tuesday arrested in a case related to the attack on the Pakistan Army headquarters in Rawalpindi on May 9 last year, soon after his release warrant was issued in the cipher case.

An anti-terrorism court (ATC) in Rawalpindi had summoned the Pakistan Tehreek-e-Insaf (PTI) founder, who is already behind bars in cipher and graft cases, in May 9 cases on Tuesday. However, Khan attended the court's proceedings via video link as he could not be produced in the court by Adiala jail authorities owing to security concerns.