A counter-terrorism drill held at Kai Tak Youth Sports Ground on Tuesday saw the authorities tackling terrorists opening fire from the stands and the discovery of a backpack containing a suspicious device.

Police, fire, customs, immigration, prison and Government Flying Service officers took part in the simulation, aimed at strengthening their capability to handle emergencies.

Senior police superintendent Peter Leung, from the inter-departmental counter terrorism unit, said the current terrorist threat level in Hong Kong is "moderate", indicating that while an attack is possible, there is no specific information suggesting the city is being targeted.

"We are planning to invite more different government departments and also the public and private sectors as well as the members of public to participate in this kind of CT [counter-terrorism] exercise because I think we have to promote the inter-departmental cooperation in the prevention of terrorist attacks," Leung said.

He said public participation in counter-terrorism exercises is crucial for raising awareness and understanding terrorism trends, adding that the drills help equip the community to prevent terrorist activities.