Officials say a police officer has been killed after responding to a shooting at a central Pennsylvania hospital.

More than 700 dancers are now on their feet to take part in the largest student-run philanthropy event in the world.

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The gunman, who received treatment at the hospital earlier, is believed to have had a gripe with some of the health care workers, authorities said.

Authorities reported that the gunman, Diogenes Archangel-Ortiz, armed with a pistol and zip ties, opened fire inside the ...