One of the students, Ann Han Ming-yan, 22, was charged with an additional count of failing to produce proof of identity on demand.

A 31-year-old cook, Lau Wai-lun, faced a sole count of obstructing police, which allegedly took place at the junction of Nathan Road and Prince Edward Road West in Mong Kok on Sunday.

Three other men, student Yim Sai-wang, 20, baker Aidan Tam Ho-yu, 24, and transport worker Tsang Tin-lok, 22, were accused of assaulting three police officers outside Wong Tai Sin Police Station on Sunday.

Hong Kong protests: more than 20 arrested after clashes in Tsim Sha Tsui, Mong Kok and Wong Tai Sin

Their cases stemmed from protests in the popular shopping district of Mong Kok on Saturday, which later spilled over to Kowloon City and Wong Tai Sin, home to the temple devoted to the Taoist deity of the same name.

The 16 defendants had been divided into two groups, and had been expected to make their first court appearances before two magistrates on Monday afternoon.

But five did not show up in court as they were still being treated at Queen Elizabeth Hospital in Jordan, and Pamela Youde Nethersole Eastern Hospital in Chai Wan. One required surgery for a fractured arm.

The remaining defendants were taken to Kowloon City Court in police vans.

Heightened security measures were observed outside the court building, where dozens of uniformed police officers and a handful of traffic wardens guarded the entrances.

Some officers were seen intercepting people dressed in black, searching through their belongings and opening their umbrellas.

Shops close early and residents stay put as anti-government protesters march through Hong Kong shopping district Mong Kok

About 100 people turned up to show support, but most could not squeeze into the small courtroom so they waited in the lobby for news.

Among those seated in the public gallery was Paulo Velasco Saret, the Philippine consul in Hong Kong, who came to observe proceedings but declined to comment.

Pioquinto showed up in the dock with thick bandages around his right forearm.

The South China Morning Post learned he had complained of being struck in the head with a baton during his arrest, and sustained injuries to his right forearm and knee.

His co-defendant, 22-year-old photographer Lee Wing-ho, also complained that police had injured his waist and leg during his arrest.

Hong Kong police accused of provoking protesters and failing to wear ID during Mong Kok chaos after extradition bill march

None of the defendants was required to enter a plea before Magistrate Raymond Wong Kwok-fai as police needed more time to investigate.

Prosecutors did not object to their bail so long as conditions were imposed.

Wong released all eight men and three women on cash bail of between HK$1,000 and HK$2,000 (US$128 and US$255), on condition they remain in Hong Kong, report to a police station once a week and adhere to a curfew of at least six hours up to 6am.

The two youngest defendants, 15 and 16, were also required to pay a HK$1,000 surety and obey a stricter curfew from 11pm to 6am.

All were ordered to return to the same court on September 30.

Those who were in hospital were expected to make their first court appearance on Thursday and Friday, or as soon as they were discharged.

Also on Monday, a former Hong Kong civil servant known for taking the government to court applied for a judicial review challenging three police commanders’ handling of the mob violence at Yuen Long MTR station on July 21.

Kwok Cheuk-kin, widely known as “the king of judicial reviews”, said in his application to the High Court the officers’ inaction breached the Police Force Ordinance and amounted to malfeasance.

The three officers were identified as: Yuen Long District Commander and Chief Superintendent Lee Wai-man, Assistant Commander Yau Nai-keung and Pat Heung divisional commander Li Hon-man.