Police are going door to door at Yale University to search for a gunman on campus, a spokesman has warned.
Yale University urged students and staff to co-operate, warning, "When they knock on your door, a Yale police officer will slip their Yale ID under the door".
"Police may use keys, but they will identify themselves", the university website added.
Libraries and some public schools are also on lockdown as the search continues, New Haven Police Department spokesman David Hartman said.
More top news
Google says it plays by the rules, HM Revenue & Customs seems satisfied, the trouble is MPs don't seem to believe that HMRC is competent.
OK Go's Upside Down & Inside Out video was shot on a plane capable of parabolic flight, which provides brief periods of weightlessness.
Teaching assistant Kevin Wilson who brutally attacked his heavily pregnant ex-girlfriend killing his unborn son, has been jailed for life.