ISLAMABAD, June 10 (Xinhua)-- Three people were killed in a NATO convoy attack in Pakistan's southwest city of Quetta, according to sources with a local media. At least one vehicle was damaged during the attack. Exact time of the attack is not known yet. This is the second attack on NATO convoy in Pakistan following Tuesday night's attack on a NATO convoy near the country's capital city of Islamabad, in which some 60 trucks of a NATO convoy for supplying oil and other materials for Afghanistan were destroyed by some 30 Pakistan Taliban militants, resulting in 8 deaths and 7 injuries. 