Five men who were on the run after firing shots at a police patrol here in Brazil's largest city invaded a private home and held the family hostage for more than an hour before surrendering, authorities said Friday.

The first to give up was one of the two gunmen wounded in the initial clash with police. His comrades followed suit a few minutes later.

Police subsequently found the second wounded gunman dead inside the home.

The hostage situation capped another night of violence in metropolitan Sao Paulo, with a death toll of 15, including four people slain in a single incident.

The latest killings came three 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.

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. EFE