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
ITV Border Political Editor Peter MacMahon says it's far too early to call this referendum.
A World War Two veteran has told ITV News he has fulfilled a boyhood dream by voting for an independent Scotland.
Keep on top of the referendum results as they are announced from 32 counting stations across Scotland.