A hot air balloon flies over the Tyrolean Alps near Kitzbuehel, Austria, on Jan. 15, 2018. (Joe Klamar/AFP via Getty Images)
Sonja Kellner of the Lower Austrian Red Cross told news agency APA that two of the passengers were seriously injured in the crash in the Bucklige Welt region, an area named for its hilly landscape.
They were found with two other slightly injured passengers at Untereck, while the other five passengers were found with minor injuries near Stang, about 5 kilometers (3 miles) away.
The cause of the crash was unclear.
The two seriously injured passengers were taken by helicopter to local hospitals.