In less than a week, two more tribesmen were shot dead Thursday by suspected Islamic militants on suspicions of spying on them for the US troops, said intelligence sources. Armed men in a car fired on two tribesmen in Wana, the main town of South Waziristan tribal agency, and fled, leaving them dead, sources told KUNA. Few days back, another tribesman was killed in neighboring North Waziristan tribal agency on the same charges.