The separate Climate Camp in the City, an occupation of a major road, was entirely peaceful - but highly disruptive for anyone in the area.

BBC: Policing protest: Case studies of how forces perform

The occupation - on the road linking Mexico City with the beach resort of Acapulco - came in response to the murder of vigilante leader Guadalupe Quinones Carbajal on Monday.

BBC: Mexico vigilantes detain police in Guerrero