The former Pakistani prime minister, Benazir Bhutto, says she has been prevented from travelling abroad on account of the corruption cases she faces.

Miss Bhutto was stopped as she tried to board a plane at Karachi airport.

Miss Bhutto denies all allegations that she's been involved in corruption, and says the courts have given her permission to go abroad.

She described the travel ban as political revenge for her allegations of corruption against the current prime minister.