"Pakistan's nuclear stockpile continues to grow. We are concerned that this growth, as well as the evolving doctrine associated with tactical nuclear weapons, increases the risk of an incident or accident," Lt Gen Vincent Stewart, Director of Defence Intelligence Agency told lawmakers yesterday during a Congressional hearing.
    
"Islamabad continues to take steps to improve its nuclear security, and is aware of the threat presented by extremists to its programme," Stewart said during his testimony before the House Armed Services Committee on Worldwide Threats.
    
Pakistan will face internal security threats from militant, sectarian and separatist groups this year, he cited, adding that ISIS in Khorasan and al-Qaeda in the Indian subcontinent will also remain significant security concerns for Islamabad.

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