Pakistani security forces in a retaliatory operation Sunday killed at least 10 militants and wounded about a dozen others in North Waziristan tribal agency bordering Afghanistan, said an official.The forces launched a retaliatory operation after militants attacked a convoy in Sarnarai area of the agency, military spokesman Waheed Arshad told media. He said the operation killed ten militants and wounded about a dozen others. He said about eight soldiers were also wounded in the attack.