A man armed with a rifle and a handgun has killed four people inside a medical building in Tulsa, Oklahoma.
The attacker then turned the gun on himself, police said in what is the latest in a string of mass shootings in the US.
A man armed with a rifle and a handgun has killed four people inside a medical building in Tulsa, Oklahoma.
The attacker then turned the gun on himself, police said in what is the latest in a string of mass shootings in the US.