KABUL, Sept. 14 (Xinhua) -- Afghan authorities have arrested two insurgents of Tahir Yaldash-led group in north Afghanistan, a statement of National Security Directorate (NSD) said Monday.

    "The two militants include Khalid Ahmadov Alias Salimullah, a national of Uzbekistan from Farghana province and Nisar Ahmad nicknamed Aliyas, an Afghan national, were arrested in Kunduz province days ago," the statement added.

    Both the rebels admitted they had received training in Pakistan's lawless tribal area of Wazirustan and came to Afghanistan in Tahir Yaldash's order to carry out activities.

    Tahir Yaldash, led by Uzbekistan militants, kept in close contact with al-Qaida chief Osama Bin Laden and has penetrated into northern Afghan province of Kunduz bordering Tajikistan.

    Kunduz, Baghlan and Balkh provinces in north Afghanistan have been the scene of increasing militancy over the past couple of months.

    Latest air strikes on two oil tankers hijacked by Taliban militants in Kunduz province on Sept. 4 left over 100 dead, including scores of civilians.