Two police shot dead and two injured in Louisiana

Two policemen have been shot dead and two others wounded in an early morning shootout near New Orleans.

The first attack occurred early on Thursday as an officer was shot for unknown reasons in an industrial plant car park, a sheriff said.
Two officers were then fatally shot at a trailer park while investigating the first incident.
Five people are in custody, some with gunshot wounds, police said. They do not think any suspects are still loose.
The two wounded officers are undergoing surgery at local hospitals, they added.