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Armed police rushed to the station in the heart of London – where a terror attack unfolded at the start of this summer, leaving eight dead.

Photos from a Daily Star Online reporter at the scene show six police cars – including an emergency response unit – at the scene.

Several ambulances – including an incident response unit – were also called to the busy train and London underground.

The metal gates into London Bridge underground station were closed as passengers were evacuated.

(Image: DAILY STAR ONLINE) (Image: DAILY STAR ONLINE)

The evacuation comes just one day after a terror attack on the District Line at Parsons Green station.

A total of 30 people were injured after a homemade bomb went off – sparking a stampede.

An 18-year-old man was arrested in Dover, Kent, in connection with the attack today.

Armed police also raided a property in Sudbury-on-Thames, Surrey, in connection with the incident – and reportedly found a bomb – today.

(Image: DAILY STAR ONLINE)

(Image: DAILY STAR ONLINE)

(Image: TWITTER) (Image: TWITTER)

An air ambulance has been seen circling overhead.

Philippa Carveth wrote on Twitter: "Air ambulance making a lot of noise next to London Bridge/Tower Bridge. Does anyone know what's happened?"

(Image: DAILY STAR ONLINE)

British Transport Police has tweeted that a person has been hit by a train on the Northern Line – which goes through the tube station.

But the station has been evacuated and there are six police cars, three vans, an ambulance, one fire and one emergency response unit on the scene – a huge response.

Police told a Daily Star Online reporter at the scene a person had been hit by a train.

Witnesses at the scene suggest the person has survived.

An ambulance left with a patient.

(Image: DAILY STAR ONLINE) (Image: DAILY STAR ONLINE)

The situation is understood to have been made complicated by a large number of football fans on the scene.

Leeds played Millwall at The Den in South Bermondsey today and a lot of fans travelled through the station.

A BTP spokesman tweeted: "Sadly a person has been struck by a train at London Bridge station. Paramedics and officers are on site, incident is not suspicious."

(Image: TWITTER) (Image: TWITTER)

This incident appears not to have been terror-related.

However, it is understandable Londoners are jumpy at this time.