A murder investigation has been launched after a young man was stabbed at a council's headquarters close to Wembley Stadium.

Emergency services were called to Brent Civic Centre in north London at 2.25pm and found the victim, believed to be a teenage boy or man in his early 20s, with stab wounds.

He was treated by paramedics but pronounced dead at the scene.

The civic centre, home to Brent Council's headquarters and a library, was evacuated and is now shut until further notice - with police yet to make any arrests.

The Metropolitan Police are also "urgently" trying to identify the victim and inform his next of kin.

Staff, residents, and visitors all witnessed the attack and were left "shaken", according to council leader Muhammed Butt.

Police have enacted a Section 60 order, giving officers enhanced powers to stop and search people and vehicles.

Superintendent Chris Clarke, lead for emergency response policing in the area, said: "An investigation is under way to establish exactly what has taken place and trace those responsible.

"We recognise the concern this incident will cause within the local community and are committed to keeping residents informed as our inquiries progress.

"In light of the incident, we have authorised additional stop and search powers to help prevent further violence, support our investigation, and keep people safe."

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Mr Butt urged people to stay away and praised the emergency services for their response.

He said: "Today, Brent has been shaken by an appalling and deeply tragic incident at the civic centre, in which a person has lost their life.

"Our thoughts are first and foremost with the victim, their family and loved ones, as well as the staff, residents and visitors who witnessed what happened.

"The civic centre has been evacuated and will remain closed until further notice."