Police station shutters came down with a message on the front saying that the Tottenham Police station was closed.The first two to arrive for the vigil, were Islington pensioner Anne Johnson, 80, a member of the Communist Party of Great Britain, and 73-year-old Martha Osamor.
Ms Johnson said: "I feel so sorry for the Duggan family. This is yet another death involving the police and a black person.
"People are not getting justice. The police should not be killing people."
Ms Osamor, who works at Haringey Law Centre, in Tottenham, said: "I knew Mark Duggan when he was a little boy. So little has changed over the years.
"Here am I picketing outside Tottenham police station yet again."
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Cloud and outbreaks of rain will ease away eastwards during the morning, clearing the east coast around midday with sunny spells developing.
Police and emergency services are attending the scene.
Rebel-held east remains at risk while the pumping station supplying the western part of the city is once again in operation.