An AgustaWestland A109 helicopter crashed south of the River Thames in London, U.K. in poor weather. Two people have died and several others have been injured following, according to initial reports by local police.

The twin-engined helicopter hit a tower crane on top of a residential building as it was approaching the London Heliport in Battersea, around 0800 GMT on Jan. 16. Wreckage landed in streets around Wandsworth Road, near Vauxhall railway station.

The two people killed were the pilot and someone on the ground, emergency services said.

The helicopter was on a flight from Redhill in Surrey to Elstree in Hertfordshire. The aircraft was reportedly diverting to Battersea because of poor weather. At the time of the incident weather data from London City Airport reported 700m visibility at a ceiling of 100ft.

The aircraft involved is understood to be G-CRST, a 1998-built Agusta A109E operated by Cornwall-based Castle Air.

The U.K. Air Accident Investigation Branch has dispatched a team of investigators to the scene.