NATO's Secretary General, Anders Fogh Rasmussen, condemned the suicide attack which rocked Afghanistan's capital Kabul on Tuesday, claiming at least 20 lives, including soldiers from the alliance's ISAF mission, DPA reported.
"I express my condolences to the families of those who lost their lives in this suicide attack, and I wish a full recovery to the injured," Rasmussen said in a statement.
"NATO remains committed to its mission to protect the Afghan people and to strengthen Afghanistan's ability to resist terrorism," he added.
The blast occurred in western Kabul at the Counterinsurgency Academy situated in Camp Julien near parliament and other government buildings. Afghan and US troops are quartered in the camp.
The attack happened as President Hamid Karzai was scheduled to hold a press conference after his recent visit to the United States.