Riot police fired tear gas at protesters in Hong Kong after tens of thousands took to the street for the seventh consecutive weekend amid an ongoing political crisis over a now-suspended extradition bill.The demonstration had begun as a peaceful march, with organizers estimating that more than 400,000 people had joined the rally, while police said 138,000 took part in the march. Many wore the signature black look that has become a common sight at recent protests and chanted Free Hong Kong! as they thronged through the city.But as the night wore on, thousands defied police orders to march beyond the designated end point toward the Chinese government's liaison office. Protesters spray-painted slogans on walls close to the building, before retreating in the face of a growing police presence.Intermittent skirmishes continued amid chants of Liberate Hong Kong, as the crowd headed to the center of the city. Once there, riot police armed with batons and shields fired tear gas to disperse a la