Petrol bombs thrown and tear gas fired in eastern Kowloon as protest turns ugly after stand-off

• Protesters throw two petrol bombs at police in Telford Plaza while officers outside Ngau Tau Kok Police Station fire tear gas after being targeted with projectiles
• Approved march starts with stand-off at MTR station as rail operator suspends services, drawing ire of residents; event follows earlier failed protest bid to disrupt transport links to airport 

Hong Kong kicks off its 12th straight weekend of anti-government protests with an approved march in Kwun Tong that is taking a tense turn as demonstrators again resort to blocking roads, while earlier, residents engaged MTR staff in a stand-off over suspended train services.

More than a thousand people showed up in the industrial district, calling for the full withdrawal of the now-shelved extradition bill and demanding an explanation over a plan to set up "smart lamp posts" along roads. The devices measure traffic conditions, weather and other data, but critics say they infringe upon privacy. The march follows a plan in the morning to cripple transport links to the airport, but that protest action failed to take off because of low numbers.

The Kwun Tong procession will head from Tsun Yip Street to Zero Carbon Building in Kowloon Bay, and marks the latest in nearly three months of demonstrations that have rocked the city. The political crisis was sparked by the hated extradition bill, which would have allowed the transfer of fugitives to jurisdictions with which Hong Kong has no such agreement, including mainland China.

Follow our live blog below for the latest updates. Reporting by Chris Lau, Linda Lew, Liu Yujing, Karen Zhang, Sum Lok-Kei and Victor Ting.

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