The men, in their 20s and 30s, were approached by a man who attacked them with a knife at 10.15pm on Sunday before fleeing.

Eyewitness photos showed police tape up outside the Two Brewers, a gay club on Clapham High Street.

The two men were taken to hospital but have since been discharged.

The Met is trying to track down the attacker.

Read more: Police arrest two for ‘murder’ after triple stabbing in Harrow leaves one dead and two injured

Detective Inspector Gary Castle said: “We are acutely aware of the shock this attack will cause members of the LGBT+ community and I want to reassure people that an urgent investigation is ongoing to locate the person responsible.

“We recently announced the reinstatement of LGBT+ community liaison officers for each of our 12 BCUs in London to support and advise on investigations where homophobia is a motive, and to ensure the community has a dedicated point of contact to address any concerns they may have.”

Call 101 using or tweet @MetCC using CAD7198/13Aug or ring Crimestoppers on 0800 555 111.