Two people have shot and killed two police officers in the US city of Las Vegas, before killing another person and then shooting themselves.
The incident began in a pizza cafe at 11:30 (18:30 GMT) on Sunday, when a man and a woman shot at the two officers who were having lunch.
They then entered a Walmart shop nearby and shot one person dead, before killing themselves.
Police say there are no other suspects in the shooting.
The woman shot her male companion before turning the gun on herself, Sheriff Doug Gillespie of the Las Vegas Metro Police Department said at a news conference.
Read more: http://www.bbc.com/news/27757928