Pakistan International Airlines has launched an investigation into how seven passengers without seats were allowed on to a flight.
According to reports in a Pakistani newspaper, the airline allowed 416 passengers to board a flight between Karachi and Medina in Saudi Arabia, even though there were only 409 available seats on the aircraft.
Despite reports that the extra passengers had to stand in the aisle during takeoff, the flight on January 20 continued for three hours to its destination before landing safely.
News of the overcrowded flight was broken by the Dawn Newspaper in Pakistan, which reported that the extra passengers were given handwritten boarding passes instead of computer-generated ones.