How did they get on the runway of London City airport? Nine demonstrators got onto the runway and chained themselves to a tripod at about 5:40 am London time.
Police were unable to remove the protesters, and the airport is currently closed for take-offs and landings.
The protesters, who claim to be acting in support of Black Lives Matter UK, are said to have got onto the tarmac at the airport after using a boat to sail across the Royal Docks.
It came as thousands of British Airways customers suffered hours of delays at airport check-in desks due to a technical glitch.
Disruption continues due to protestors at LCY, police are on site. We apologise for inconvenience, check with airline for flight status.
A statement released by the protest group said: “This morning activists in support of Black Lives Matter UK shutdown London City Airport in the London Borough of Newham.
Protesters claim there is an environmental crisis in the UK and this crisis leads in ensuring that the climate crisis is a racist crisis.
Air passengers vented their frustration on social media at the disruption caused by the protest