Hong Kong: Hong Kong chief executive Carrie Lam held an emergency meeting with ministers on a lethal night that saw a black-clad man believed to be a protester found in a pool of blood and pronounced dead shortly afterwards.

A 70-year-old man hit in the head with a brick thrown by a protester was in a critical condition in hospital.

A 15-year-old reportedly suffered a skull fracture from a police tear gas canister fired and underwent surgery.

As clashes between riot police and protesters flared across five locations, and major roads were barricaded with bricks, senior government officials were seen arriving at Government House at 10pm.