Police investigated after Brazil killings

Authorities are investigating the alleged involvement of police officers in the brutal killings of seven residents of a poor neighbourhood in north-eastern Brazil.

Four women and three men were found shot to death on Thursday, just hours after they allegedly engaged in a heated altercation with an off-duty police officer in the outskirts of Recife, 1,400 miles northeast of Sao Paulo in Pernambuco state, authorities said.