The London Ambulance Service was called at around 4.30am today (December 3) to the park.
Paramedics arrived within six minutes, however, a man died at the scene.
A police cordon is in place.
The nature of the incident is unclear at this stage.
We have contacted the Metropolitan Police for further details.
A spokesperson for London Ambulance Service said: “We were called at 4.26am today (3 December) to reports of an incident in Alexandra Park, north London.
“We sent ambulance crews, a paramedic in a fast car, an advanced paramedic and an incident response officer to the scene.
“The first paramedic arrived in less than six minutes.
“Sadly, a man died at the scene.”
