The plane, operated by Austrian Airlines, was actually heading to Vienna, Austria.
"In line with our protocol, an air force fighter jet took off and escorted the aircraft until it landed at Sofia Airport," Bulgaria's transport and communications authority said, according to Sky News.
Six crew members and 51 passengers were reportedly on board. All were safe and unharmed, an airport spokesperson said, according to Israel's The Jerusalem Post.
The aircraft was taken to an isolated location, where bomb technicians and security personnel examined it, according to the newspaper. No explosives were reportedly found.
