By Chris Michaud, Reuters ORLANDO, U.S. — Gunfire erupted at a gay nightclub in Orlando early on Sunday, causing mass casualties and leaving one suspected gunman dead inside, police said. Officers said in a Twitter message that there were “multiple injuries” at the Pulse nightclub and local media reported that between seven and 20 people had been shot. Exterior shot of Pulse nightclub. Phot courtesy of Reuters. The dance club urged patrons to “get out” and “keep running” in a post on its Facebook page. Police have not confirmed if there were any other people killed or the specific number of injuries. A news conference was scheduled for 7 a.m. (1100 GMT). Several patrons had posted on social media that a gunman was holed up inside and holding hostages. One man who said he was inside the club posted that the shooting broke out around 2 a.m. and that [...]