At least seven suspected militants were killed and another four injured when a US drone attacked a vehicle with two missiles in Machikhel village near Mirali town of North Waziristan Agency on onday.Officials said a flying coach with several people onboard was passing by the Machikhel village when it was attacked. The vehicle caught fire, killing seven people in the vehicle. Soon after the attack, militants from the surrounding areas rushed to the site and started shifting the dead bodies and injured to an unidentified place.The identity of the deceased could not be ascertained so far.