Pakistan Navy has found clues into the involvement of internal elements into the terrorists attack on Pakistan Naval Station (PNS) Mehran. Navy officials on Wednesday gave in-camera briefing to the National Assemblys Standing Committee on Defence meeting chaired by its head Azra Afzal. According to media reports the navy authorities have found clues that suggest the terrorists had internal support to launch the attack. The navy officials apprised the NA body about the investigation being carried out into terrorists attack on PNS Mehran on May 22 that led to killing of 10 officials and destruction of two US-supplied PC-3 Orian aircraft.