Three people have been critically injured after being stabbed at a medical centre in Los Angeles, said police.
The knifings took place at the Encino Hospital Medical Center with the suspect then barricading himself inside a room.
He was later taken into custody by police.
Multiple people have been seen taken out of the building on stretchers including one person who appeared to be wearing a hospital uniform.
LAPD officers were called to the hospital on Ventura Boulevard at 3:50 pm local time, said spokesman Drake Madison.
He said that two people were found in a serious condition.
Then Nicholas Prange, a Los Angeles Fire Department spokesman, later confirmed three people were transported to a trauma centre in critical condition.
A man who appeared to be in his mid to late 30s is reported to have gone into the medical centre and complained of suffering from anxiety before starting the stabbing spree.
Now a nearby hospital that has received the injured says that their conditions are stable.
"Dignity Health Northridge Hospital Medical Center received three patients to our Level II Trauma Center suffering stab wounds from the incident at Encino Hospital Medical Center," a statement from Dignity Health Northridge Hospital said.
"All three patients are currently listed in stable condition."
The suspect has now been detained by police and is in custody, a hospital spokesperson told NBC Los Angeles.
At least one medical member of staff has been injured said a Los Angeles Times police source.
And the source has barricaded himself into a room in the hospital, added the source.
It comes after a gunman killed four people and then shot himself after a "catastrophic" attack at a medical centre in Oklahoma on June 1.
More than 20 police cars and other emergency vehicles rushed to the Warren Clinic, a medical centre on the Saint Francis Hospital Campus, in Tulsa where the shooting took place.
Police described the scene as "catastrophic" with a man having entered the building with two weapons, a long gun and a handgun, and then opened fire.
A Tulsa Police spokesperson confirmed that five people in total had died and ten people have been injured.
It later emerged the attacker had carried out the massacre because he was unhappy with a doctor over the results of back surgery he had received recently.
