Unidentified miscreants threw pamphlets in red zone of the capital in which they threatened to kill the President and the Chief Justice.
Authorities found a letter in the parking area of the Supreme Court in which a man who mentioned himself as Sumandar Khan threaten to kill the Chief Justice and the President.
He also threatened to blow up the building of Supreme Court on August 26 and claimed that bombs have been planted in the premises.
The Chief Justice has taken notice of the letter and ordered the authorities to tighten the security of the Supreme Court.
The security of the president has also been increased while intelligence agencies are investigating the threat.