Hong Kong, Sept. 1 -- Train service to Hong Kong's airport was suspended Sunday as pro-democracy demonstrators gathered there, while protesters outside the British Consulate called on London to grant citizenship to people born in the former colony before its return to China.

Hong Kong has been the scene of increasingly tense anti-government protests for nearly three months. They began in response to a proposed extradition law and have expanded to include other grievances and demands for more democracy and the resignation of the territory's leader.

On Saturday, protesters threw gasoline bombs at government headquarters. Police stormed a subway car and hit passengers with clubs and pepper spray.

On Sunday, several hundred protesters gath...