One person is treated for burns following fire at the Sir Robert McAlpine construction site in central London.

A huge blaze has engulfed the construction site for the £56m Guardian Newspapers headquarters in London, forcing the closure of nearby King's Cross railway station.

A 200m exclusion zone has been set up around the Sir Robert McAlpine construction site on the junction of York Way and Crinian Street as fire fighters battle the blaze. King's Cross has been closed amid fears the fire, which began around 8.30 this morning, could spark a gas explosion.

It is understood that an acetylene cylinder is involved in the fire, which has set half of the top floor of the eight-storey building ablaze. At least one person has been taken to hospital suffering from burns, and around 630 people have been evacuated from the area.

The impact on the project is currently unclear. The scheme, which will be called King's Place, will include 28,000 m2 of office space, a concert hall, art gallery and retail space. It was designed by Dixon Jones and is being developed by Parabola Land.