Chief Executive Donald Tsang and Commissioner of Police Tang King-shing have condemned the culprits behind the recent acid attacks in Mong Kok -including one on Nelson St last night. 

Speaking after the Executive Council meeting this morning, Mr Tsang said the Police will be able to catch the people responsible.

A $300,000 reward has been offered for information leading to a conviction in last night's incident. Combined with rewards offered for information regarding the previous two acid attacks in Mong Kok since last December, a total reward of $900,000 is available.

Mr Tang said the Police will spare no effort to bring the culprits to justice.

"We will not rule out any possibilities and are looking at all leads to solve the cases," he said.

Police are reviewing pictures captured by closed-circuit televisions installed on rooftops and at entrances of nearby buildings, he added. They are also going through entry records of buildings in the vicinity, and scrutinising household interviews conducted since last night.

He urges witnesses or those with information to call the 24-hour hotline, 2761 2401. He also gave a reminder of the seriousness of the act.

"These are extremely serious offences. Those convicted can face possible life imprisonment," he said.

CCTV installation complete

The installation and testing of CCTVs in the pedestrian precinct had been completed, and round-the-clock automatic monitoring of objects falling from a height had started right after the handover at 3pm yesterday, according to the Yau Tsim Mong District Council's working group on the Mong Kok pedestrian precinct.

The group's chairman Hau Wing-cheong said video recordings from the CCTVs are used only for Police investigation into incidents of attacks from a height. The district council are taking all practical steps to ensure data security and to guard against unauthorised access to or use of the images.