This image grab from an AFPTV footage shows Smoke billowing after airstrikes that killed seven people in Yemen as a Saudi-led coalition hit back against a sweeping advance by the UAE-backed Southern Transition Council (STC) that threatens to spiral into a major confrontation. The deaths are the first from coalition fire since the secessionist STC seized swathes of Hadramawt and Mahra provinces last month. Saudi Arabia and the UAE have for years supported rival factions in Yemen's government-run territories but the STC's offensive has angered Riyadh and left the oil-rich Gulf powers at loggerheads.