The St. Francis Hospital Campus was under lockdown following the incident at the Natalie Building, which houses a breast health centre and an outpatient surgery centre, according to _AP_.

The report added that authorities and medical officials were not ready to identify the deceased. The shooting at Tulsa comes just more than a week after one of the deadliest grade school

shootings in a decade when an 18-year-old gunman killed at least 19 students and two adults at Robb elementary school in Texas. News agency ANI reported that US President Joe Biden was

briefed on the shooting while the White House closely monitors the situation. The White House has also reached out to state and local officials to offer support. _(With inputs from AP.)_