The explosion happened in the southern province of Kandahar, local officials said, adding the security guards were escorting the logistics convoy destined for NATO`s International Security Assistance Force (ISAF).
"The attack took place around 6:30 pm, a suicide attacker detonated his car loaded with explosives near the private security firm," Zalmay Ayoubi, a spokesman for the governor of Kandahar, told AFP.
"He targeted the logistic convoy. As a result, two people were killed and 21 injured."
Ayoubi named the security company as Afghanistan Naween and said the attack happened close to the firm`s premises.
All the dead and injured belonged to the security firm with the exception of one of the wounded, who was a civilian, Ayoubi said.
ISAF, which has about 130,000 troops in Afghanistan fighting a Taliban-led insurgency, uses private companies to transport and protect logistics convoys in the war-torn country.
Kandahar, birthplace of the Taliban, is one of the deadliest areas in the nearly 10-year conflict. (M014/K004)
Editor: Kunto Wibisono
Copyright © ANTARA 2011
