Authorities believe Robert Jourdain, Todd West and Kareem Mitchell randomly opened fire at a car at the intersection of 6th and Greenleaf streets in Allentown early Sunday morning.
The driver, 32-year-old Francine Ramos, and passenger, 21-year-old Trevor Gray, were killed.
Police say just minutes earlier, the same three men shot and killed 22-year-old Kory Ketrow on Lehigh Street in Easton.
Investigators say the suspects didn't stop there.
West and Jourdain allegedly went on to rob three people in Allentown on Monday.
Both were arrested after being identified by witnesses.
That's when investigators say West allegedly confessed to the shootings
Northampton and Lehigh County authorities say the public is no longer in danger.