<p> At least nine people have been killed in a police raid in the Brazilian city of Rio de Janeiro, the state's authorities said on Wednesday.</p>.<p>The operation was aimed at locating and arresting members of criminal groups during which authorities were attacked by armed individuals, police say.</p>.<p>One officer was wounded but is stable in hospital.</p>
<p> At least nine people have been killed in a police raid in the Brazilian city of Rio de Janeiro, the state's authorities said on Wednesday.</p>.<p>The operation was aimed at locating and arresting members of criminal groups during which authorities were attacked by armed individuals, police say.</p>.<p>One officer was wounded but is stable in hospital.</p>