Brazil: at least 21 people killed during police raid in Rio favela

Death toll puts the incident among Rio's deadliest police operations in recent history

At least 21 people have been shot dead and seven wounded during a police raid on a Rio de Janeiro favela to capture the leaders of a drug-trafficking organization.

The deaths included a woman who was hit by a stray bullet in the exchange of gunfire between gang members and police in the Vila Cruzeiro favela.