Afghanistan President Hamid Karzai spoke harshly about U.S. and NATO troops Thursday after recent Taliban attack in capital of Kabul (Isafmedia/Creative Commons).

Asadullah Khalid, director of the National Directorate of Security (NDS), suffered wounds to his chest and midsection when a visitor detonated a bomb at a guesthouse used by the agency. 

Taliban spokesman Zabihullah Mujahid said in a statement that Khalid was the main target of an explosive attack that killed and wounded a number of other spies, according to the Chicago Tribune.

The statement claimed that Khalid was in a coma, but the group has made unsubstantiated claims in the past.  Officials have not yet declared other causalities.

It was the first attack to unjust a senior government officials in the capital since September 2011 when a Taliban bomber killed former Afghan President Burhanuddin Rabbani and four other members of the government-backed High Peace Council in negotiations with with Taliban at the time.

ALSO SEE: Ex-Afghan President Rabbani Killed At Taliban Meeting

The bombing brings forward the issue of Afghanistan's instability as NATO troops led by the U.S. prepare for a withdrawal in 2014.

In an interview with NBC Thursday, Afghan President Hamid Karzai had some harsh words to for the United States and NATO, saying they are breaking a signed agreement between the two countries.

Attempts to engage in formal peace talks with the Taliban have made little progress, adding to the pressure on Karzai's government to improve security before Western troops withdraw.

Reach Executive Producer Lauren Foliart here.