Two persons were killed and three others sustained wounds when unknown armed men opened indiscriminate firing on a car in which they were travelling in Wana area of South Waziristan on Thursday. According to reports, the tribesmen were on the way when armed men intercepted them in Wana bazaar and opened firing on them, killing two on the spot and injuring three others. The injured were shifted to the Wana hospital for treatment. The reason behind the attack was not ascertained yet.