A gunman shot two people outside a Wawa convenience store in Pennsylvania early Wednesday morning before taking his own life, authorities said.

The shooting spree began on U.S. Route 22 in Lehigh County around 4:48 a.m., when the shooter, driving a white Toyota Corolla, fired at a woman in another vehicle, Lehigh County District Attorney Jim Martin said during a news conference. The woman did not realize she had been fired upon and then stopped at the store in Upper Macungie Township to buy a sandwich. When she left the store, she noticed the bullet hole in her car, Martin said. 

The gunman, identified by authorities as Za Uk Lian, 45, of South Whitehall Township, also drove into the Wawa parking lot. He shot a man inside a Jeep, who suffered injuries that don't appear to be life threatening, and then Ramon Ramirez, 31, of Allentown, who was pumping gas into a tractor-trailer, authorities said. Ramirez was fatally wounded.

Lian then ran on foot about a quarter-mile down the highway and appears to have died from self-inflicted gunshot wounds, according to Martin.

A nearby early education center had earlier posted on Facebook that an active shooter was taken “into custody” on its property. 

The shootings appear to have been indiscriminate, and no motive is known. Police are continuing to investigate.

Upper Macungie is a suburb of Allentown and located about 60 miles northwest of Philadelphia.

This article was updated to include additional information from officials.