A man holding what appears to be a pomeranian dog has climbed to the top of King’s Cross station in London where has unfurled a banner calling for freedom for Iran.

The man could be seen standing in front of the clock face on the station’s 34-metre tower at rush hour on Tuesday morning.

British Transport Police said officers were called to King’s Cross at about 8am after reports of a person in a precarious position.

A spokesperson said: “The incident is ongoing and officers are in attendance alongside other emergency services, working to bring the incident to a safe conclusion.”

An ambulance crew, an incident response officer and paramedics from the hazardous area response team are also present at the scene.

The front of the station was shut to passengers as Network Rail, which operates the station, isolated the area beneath where the protester stood.

Network Rail wrote in a post on X that train services had been unaffected by the incident. It said it was “supporting emergency services to ensure the situation is resolved safely”.

Main entrances have remained open but the exits from platforms 1-8 have been closed.

Suspended from the clock tower was a banner with slogans written in Farsi and in English. It states in English: “Iran belongs to its people. Freedom for Iran. Every deal with them against human rights. Dictators exert terror and poverty.”

The banner also features the logo of the Freedom Movement of Iran, a pro-democracy party that promotes separation between religion and state. The party is outlawed by the current Iranian government.

The man was holding what appeared to be a pomeranian dog and wearing a T-shirt with a “no to war” slogan. He was seed making video calls and taking selfies. Police officers wearing climbing equipment were seen preparing to scale the tower.

A London fire brigade spokesperson said it was called at 8.14am and two fire engines and about 10 firefighters were assisting British Transport Police.