The U.S. Department of Transportation sued Southwest Airlines Wednesday, alleging it illegally operates flights that are persistently delayed, harming passengers and fair competition in the airline industry.

Yesterday, the United States and U.S. Department of Transportation (DOT) disclosed a lawsuit against Southwest Airlines, accusing the airline of chronically delayed flights and interrupting passengers’ travels.

The U.S. Transportation Department is suing Southwest Airlines and has fined Frontier Airlines over "chronically" delayed flights, disrupting passengers' travel and plans.

Tragedy on a Southwest Philadelphia street as a woman was violently killed Wednesday afternoon, out on the street.

Philadelphia homicide detectives are investigating a fatal stabbing in the southwest section of the city. Officials said it was around 4 p.m. Wednesday when a woman in her 20s was stabbed once in the chest along the 2100 block of South 58th Street.

A woman was stabbed in the chest in Southwest Philadelphia on Wednesday evening, according to police. She died from her injuries.