Armed Qld man surrenders to police

An armed man who barricaded himself inside a Toowoomba unit has surrendered to police following a lengthy stand-off.

Police declared an emergency at 4.25am on Saturday, four hours after first going to a disturbance at the unit complex in South Toowoomba.

The 31-year-old man, who had been armed with a knife, has been taken to the Toowoomba Base Hospital for a mental health assessment.