Mayor of Portland bans police from using tear gas after three months of riots

Police use chemical irritants and crowd control munitions to disperse protesters during a demonstration in Portland, Oregon (Noah Berger/AP)

The mayor of Portland has banned police in the US state of Oregon’s largest city to stop using tear gas for crowd control during the frequently violent protests that have plagued the city for more than three months since the police killing of George Floyd in Minneapolis.

Mayor Ted Wheeler, a Democrat, was tear gassed when he went to a demonstration against the presence of federal authorities dispatched to the city to protect federal property.