A fire in Kuwait killed 49 people when it ripped through a building housing nearly 200 foreign workers on Wednesday, the government said.The blaze, which broke out in the six-storey building south of Kuwait City at around dawn, also left dozens injured, the health ministry said.Flames engulfed the lower floors as black smoke poured out of the upper-storey windows, unverified images posted on social media showed.The interior ministry revised the death toll up to 49, from 35 issued earlier, after forensic teams scoured the charred building.