'New kind of militant' behind Pakistan Karachi attack

The deadly 15-hour siege on Pakistan's Mehran naval airbase in Karachi on Monday was carried out by attackers with military-level training, raising suspicions they had inside help. Questions are being asked about the security of Pakistan's vital military installations after a well-organised group of gunmen held off Pakistan's equivalent of the US Navy Seals - the Special Services Group - Navy (SSG-N) - for 15 hours.

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