BALTIMORE (CBS/AP) Baltimore police say a lone gunman shot a doctor on the eighth floor of a Johns Hopkins Hospital building in Baltimore, was believed to have barricaded himself in a relative's hospital room.
There were conflicting reports about whether the shooting suspect was still at-large.
Parts of the Nelson Building, the main tower at Johns Hopkins, was put on lockdown around 11:15 a.m. Thursday, and other sections of the East Baltimore hospital campus were evacuated, after reports of shots being fired, according to The Baltimore Sun.
A nurse who worked on the floor where the injured doctor was shot told the paper that the gunman was unhappy about the way his mother was being treated and had threatened to jump out of a window when the shooting occurred.
"I started running," The nurse told the Sun. "When you hear gunshots you run."
Baltimore police said they were setting up a tactical operation to deal with a gunman who is holed up on the eighth floor.
The doctor was rushed to surgery and is expected to survive, police spokesman Anthony Guglielmi said. He said he did not know the relationship between the gunman and the doctor.
The hospital said in a statement that the doctor is a faculty physician but it could not release more information because of privacy policies.
A spokesman for Johns Hopkins hospital in Baltimore earlier said the gunman had been caught, but Guglielmi says that's not the case.
Guglielmi said some parts of the hospital were being evacuated, but not the entire massive complex in east Baltimore. He says he doesn't know the doctor's condition.
"The doctor will be OK," Guglielmi said. "He's in the best place in the world - at Johns Hopkins hospital."