The protests are disrupting "all flights," the airport said on Twitter.
The protestors reached the runway, forcing incoming flights to be diverted to Gatwick and Southend airports, according to a report in The Telegraph.
The Evening Standard cited a statement released by the
"This morning activists in support of Black Lives Matter UK shutdown London City Airport in the London Borough of Newham.
"This action was taken in order to highlight the UK's environmental impact on the lives of black people locally and globally.
"As the largest per capita contributor to global temperature change(1) and yet among the least vulnerable to its deadly effects(2), the UK leads in ensuring that our climate crisis is a racist crisis."
Here's the tweet:
Flights disrupted at London City Airport after protesters got on to runway - 'Black Lives Matter' claiming responsibility for incident
- Sky News Newsdesk (@SkyNewsBreak) September 6, 2016
We're currently experiencing disruption to all flights due to protestors at the airport. Police are currently on the scene.
- London City Airport (@LondonCityAir) September 6, 2016
It's not a good day to fly. British Airways said on Monday it was experiencing a computer glitch with its check-in system, causing delays at several airports in the United States.
More to follow...