New Haven Police Department Lieutenant Jeff Hoffman confirmed to student newspaper Yale Daily News there has been no shooting or any injuries as police search for a gunman on Old Campus.
Yale Police Department and New Haven Police have blockaded a road near to the campus.
More top news
Facebook is to test a set of emoticons to add to the like button giving users more choice to react to their friends' status updates.
Nobel prize-winner and campaigner Malala Yousafzai speaks to ITV News about her political ambitions and her new Birmingham accent.
Spencer Stone, one of the three American men who thwarted the French terror attack in August, has been stabbed repeatedly.