Police Commissioner Stephen Lo has defended the firing of tear gas, rubber bullets and bean bag rounds against protesters, on Wednesday, calling the situation in Admiralty a "riot".
But the top police official brushed aside suggestions that a curfew would be imposed.
In a press briefing shortly after officers fired tear gas and guns at protesters, Lo said police had to take action after their defence lines came under attack.
He said if officers had not taken such action, "protesters would have used metal bars to stab our colleagues".
The police chief also accused protesters of engaging in violent behaviour and not allowing those trapped in the area since the morning to leave.
When asked if the police would ask the People's Liberation Army for help, Lo said "definitely not, at this stage".
The top police officer said he's confident his officers are capable of containing the situation.
Lo described the situation in Admiralty as "dangerous", "chaotic" and a "riot" said people should not enter the area.
Meanwhile, a government spokesman said in a statement that "a riot broke out in the Admiralty area" and "protesters had used very dangerous weapons and a high level of violence".
A conviction for rioting can lead to a prison term of 10 years.
Police chief defends shots during Admiralty 'riot'
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