Two police officers have been shot dead and two others wounded after they were attacked in the US state of Louisiana.

The shooting happened early on Thursday in the community of St John the Baptist Parish, near New Orleans.

Police spokesman Captain Dane Clement told reporters the gunfire rang out in a car park for a refinery beside the Mississippi river.

Two suspects are in custody and the search for a third suspect is underway,the Times-Picayune newspaper reported.

The two wounded officers are undergoing surgery, local media report.----

Source: http://www.bbc.co.uk/news/world-us-canada-19287159