Yvonne Hiller allegedly returned to the Kraft Foods baking plant today and opened fire on her co-workers, after she had been suspended by a supervisor, reports Philly.com.
After pointing her licensed .357 Magnum at security guards to gain entry, Hiller reportedly entered the building's lunchroom and opened fire on three employees who she had an ongoing dispute with.
Hiller barricaded herself in a quality control laboratory and "may have fired a shot at the first officers to arrive, before she dialed 911 and a police corporal on the line calmed her down," according to the report.
SWAT officers breached the laboratory and she surrendered.
Read the full story at Philly.com.