(MORE: Former NASCAR driver Dale Earnhardt Jr., his family escape plane crash in Tennessee without serious injuries) Officials with the Collings Foundation, an educational foundation which holds the Wings of Freedom tour, said in a statement: "Our thoughts and prayers are with those who were on that flight and we will be forever grateful to the heroic efforts of the first responders at Bradley Airport. The Collings Foundation flight team is fully cooperating with officials to determine the cause of the crash of the B-17 Flying Fortress."
Sen. Richard Blumenthal, D-Conn., on Twitter called for an immediate investigation by the National Transportation Safety Board (NTSB) "so we can get to the bottom of what happened & prevent future tragedies."
"Vintage planes must be properly maintained & flown— & the NTSB must tell us whether this tragedy could have been prevented," Blumenthal said.
The NTSB said it was sending a team to the crash site.
Connecticut Gov. Ned Lamont tweeted: "Our prayers our with the victims and their families."
Sen. Chris Murphy, D-Conn., wrote on Twitter, "My heart goes out to everyone impacted by this crash."
ABC News' Whit Johnson, Aaron Katersky, Christine Theodorou, Jason Kuang and Alyssa Acquavella contributed to this report.
Kaynak:Abcnews