Security around top government officials was tightened yesterday following Wednesday's arson attack by right-of-abode seekers at Immigration Tower.
Police, who arrested nine more suspects yesterday - some of them still in hospital - said all the demonstrators involved could be prosecuted. The total number of arrests now stands at 15.
Immigration chiefs promised to review safety measures after meeting staff representatives, who demanded their colleagues be equipped with defensive weapons such as pepper spray, shields and batons.
Nineteen of the 50 people injured during the attack remained in hospital yesterday. Seven were in critical condition, including two immigration officers. The injuries occurred at about 6pm when abode-seekers allegedly splashed paint thinner around a 200-square-foot reception room packed with 50 people and set light to it. Immigration officers had been preparing to clear them as the office closed.
Security at Immigration Tower was stepped up with checks on people entering the building and no bottles of liquid, lighters or weapons allowed on the 13th floor - where the attack took place - or the 14th floor - which has taken over some of the 13th floor's duties. The first-floor lobby was closed to all except government staff, who had their identities checked.
At least five police protection unit officers were seen escorting Director of Immigration Ambrose Lee Siu-kwong yesterday and his office was closed to the public.
Secretary for Security Regina Ip Lau Suk-yee said she had not received threats from abode-seekers, and had confidence in the ability of the police to uphold law and order.