The municipality of the Iranian capital Tehran has in a move supported vandalizing the British embassy after anti-UK slogans were painted on its walls.

This comes a few days after a group of Iranian citizens voluntarily helped paint the walls of the British embassy vandalized with anti-UK slogans.

Tehran municipality, headed by a hardliner mayor, has installed banners near the embassy in the downtown bearing the sentence, “Shame cannot be erased with paint.”

The slogans had been apparently sprayed by some pro-regime elements to protest UK’s support for anti-government protesters in Iran.

Britain summoned Iran's most senior diplomat in London on December 9 to protest the hanging of Mohsen Shekari, the first protester to be executed.

British envoy to Tehran Simon Shercliff in a tweet on Thursday thanked Iranians and international friends from Germany, South Korea, France, Italy, Brazil and some other countries who sympathized with the UK.

Photos on social media show that Shercliff himself wass also helping people to paint the walls.

This was not the first time the UK embassy is vandalized by pro-regime hardliners. In 2011, the embassy was attacked by a mob of Basij militia and hardliner activists who ransacked offices and stole documents. One small building was also set on fire during the incident and several people were injured.

It came after the UK strongly supported punitive international sanctions over Iran's nuclear program and followed a vote in the Iranian parliament to downgrade ties with Britain and in effect expel the UK ambassador.