Police report at least 4 killed and 'multiple' injured following a shooting at a Tulsa hospital

• Police responded to a shooter at St. Francis Hospital in Tulsa, Oklahoma, Wednesday.
• Authorities confirmed that at least four people were killed and multiple people were injured.

Police reported that at least four people were killed and multiple were injured after a gunman opened fire at a hospital in Tulsa, Oklahoma, on Wednesday. The shooting suspect was also reported dead.

On Wednesday afternoon, police responded to calls about a man armed with a rifle and a handgun inside a medical building at St. Francis Hospital in Tulsa. The gunfire occurred on the second floor, Tulsa Police Department Deputy Chief Eric Dalgleish said in a press briefing Wednesday evening.

Police received a call about the shooting at 4:52 p.m., were on the scene by 4:56 p.m., and made contact with the suspected shooter at 5:01 p.m., Dalgleish said.

He added that authorities believe the suspect died of a self-inflicted gunshot wound.

"This has been the facility more than any other that has worked to save the lives of people in this city," Tulsa Mayor G.T. Bynum said at the press briefing Wednesday. He then thanked "the broad range of first responders today who did not hesitate to respond to this act of violence."

The suspect's identity is still unknown but is believed to be a Black male between the ages of 35 to 40.

Representatives from the Tulsa Police Department didn't immediately respond to Insider's request for information.

Earlier Wednesday Tulsa Police Captain Richard Meulenberg said authorities were "treating this as a catastrophic scene."

About 50 miles from Tulsa, the Muskogee Police Department said it was investigating a possible bomb inside a home, KTUL reported. The Tulsa Police Department contacted MPD with information they received that said the suspected shooter may have left a bomb in the residence.

MPD told News on 6 reporter Brian Dorman that the home was searched and no bomb was found.

The shooting comes just one week and a day after 21 people — including 19 children — were killed in a mass shooting at an elementary school in Uvalde, Texas, and 18 days after a gunman opened fire inside a supermarket in Buffalo, New York. The recent spate of mass shootings renewed calls from progressive politicians and activists for firmer gun control policies.

President Joe Biden has been briefed on the situation, according to CNN White House correspondent Kaitlan Collins. "The White House is closely monitoring the situation and has reached out to state and local officials to offer support," according to the statement shared by Collins.

Oklahoma Governor Kevin Stitt said in a statement that "what happened today in Tulsa is a senseless act of violence and hatred," adding, "I am grateful for the quick and brave actions of the Tulsa Police Department and other first responders who did their best to contain a terrible situation."

This story is developing. Please check back for updates.