A joint team of police and paramilitary Rangers arrested Haroon Rasheed and Haris Rasheed yesterday from F-6 area of the capital during a patrolling, officials said today.
A gun and a military uniform were found in the car in which the two were travelling at the time of arrest, police said.
"A case has been registered against them and investigations are on, police said, adding that they are being questioned.
Haroon had registered a case in 2013 against the former dictator for his alleged involvement in the killing of the cleric during a military operation in 2007 when military commandos stormed the Mosque in the heart of Islamabad on Musharraf's orders.