All four people onboard a small plane that crashed into a busy Atlanta, Georgia, interstate have been killed, a fire official said Friday. The plane crashed into Interstate 285 after taking off from an Atlanta-area airport early Friday. Captain Eric Jackson, spokesperson for the DeKalbd County Fire Department, told reporters that four people were onboard and all of them died. He said that the east-west highway is shut down in both directions. The plane was a Piper PA-32, which departed from DeKalb Peachtree Airport. An investigation into the cause of the crash has been launched.