Videos posted on social media appearing to show mourners paying their respects to Ayatollah Ali Khamenei have been described as “deeply concerning”. The footage shows candles and pictures of Iran’s late Supreme Leader, who was killed in a strike on Tehran on Saturday (February 28).

The tributes reportedly appeared outside the Islamic Centre of England in north London. Leaflets posted online detailed events to mark Khamenei’s death at mosques in other cities, including Manchester and Birmingham. Kasra Aarabi from campaign group, United Against Nuclear Iran, told The Times vigils for a man who ordered terror plots on UK soil were “deeply concerning”. Several UK student societies have also posted statements mourning Khamenei.

University College London’s AhlulBayt Islamic Society also reportedly posted a tribute on social media to Khamenei. It is quoted by The National as stating: “We express our sincere condolences on the martyrdom of our beloved Sayed”.

The Society said its expressions of commemoration for Khamenei were lawful in the UK and did not break the College’s code of conduct.

It said mourning a figure of Khamenei’s stature did not amount to incitement of extremis, The National reported on Sunday.

Meanwhile, Iranian state television on Wednesday said a mourning ceremony for Khamenei had been postponed and would be held later after intense strikes targeted Tehran.

The Islamic Centre of England has been approached for comment. It has said previously that it does not endorse extremism and focuses only on religion, education and community work.