In the latest in a string of deadly shootings that have rocked the United States, Five people were killed, including a gunman, in a shooting on a hospital campus in Tulsa, Oklahoma.

Iran PressAmerica: The fatal incident happened after a man armed with a rifle and handgun opened fire inside a medical building in Tulsa, Oklahoma.

Police arrived at the St Francis Hospital three minutes after receiving a call about the shooting and followed the sound of gunfire up to the Natalie Building's second floor, Tulsa deputy police chief Jonathan Brooks told reporters.

Police were through every room in the building checking for additional threats, police said, according to CNN.

The Bureau of Alcohol, Tobacco, Firearms, and Explosives was assisting on the shooting scene, the ATF Dallas Field Division said on Twitter.

Police responses have increased scrutiny after a gunman killed 19 children and two teachers in a Texas school classroom last week while officers waited outside for nearly an hour.

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The previous week, ten people were killed in a supermarket in Buffalo, New York.

The teenage gunman accused of the killings in Buffalo has been charged with domestic terrorism. Prosecutors allege that 18-year-old Payton Gendron, who earlier pleaded not guilty, was motivated by racial hatred.

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Brooks said police were trying to determine the suspect's identity and estimated he was aged between 35 and 40.

The Natalie Building contains doctors' offices, including an orthopedic center, he said, adding he believed the victims included employees and patients.

The White House said President Joe Biden had been briefed on the shooting and offered support to state and local officials in Tulsa, a city of some 411,000 people that sits around 160km northeast of Oklahoma City's capital.


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