Nine people were killed in another night of mayhem here in Brazil's most populous city following the announcement by federal and regional officials of a new anti-crime plan, authorities said Thursday.

The violence, which had been concentrated in slums and gritty industrial suburbs, spread to the affluent Sao Paulo neighborhood of Jardins, where a gunman trying to rob a gas station died in a shootout with police.

Two other would-be robbers died and a police officer was wounded in a gunfight among cops, criminals and private security guards at a supermarket.

The latest killings came two days after the Sao Paulo state government and Brazilian federal officials launched a joint plan to confront a recent upsurge in violence here.

Nearly 1,100 homicides were reported in Sao Paulo state during the first nine months of the year. The victims included 90 police officers, most of them killed while off-duty.

The initiative presented Tuesday by the state and federal governments calls for creation of an integrated police intelligence center, among other steps.

The individual police agencies will continue to work within their existing jurisdictions, but intelligence-sharing will be key in the effort to "financially suffocate" organized crime, federal Justice Minister Jose Eduardo Cardozo said.

Federal officials suggest the recent spate of attacks on law enforcement in metropolitan Sao Paulo was orchestrated by jailed bosses of the First Capital Command, the region's most powerful criminal outfit.

Some NGOs, however, say the cause of the bloodshed is a war between organized crime and militias made up mainly of current and former cops. EFE