PITTSFIELD – Police continue to look for a man who robbed the Rite Aid pharmacy Thursday evening and was last seen heading north on Interstate 95.

The robber, described as a 5-foot-6 to 5-foot-8 man weighing from 230 to 250 pounds, did not show a weapon or make any threats, Pittsfield police Officer Michael Cote said.

The pharmacy employee included a GPS device in the bag the robber gave her to fill with prescription pills. Cote said the device activated when the robber left the store and showed he was headed north on I-95.

The man entered the store about 7:30 p.m. wearing a baseball cap and a dark hooded sweatshirt with the word Maine on the front, and demanded the employee at the pharmacy counter fill a plastic bag with “20s, 30s, and 80s,” Cote said.

The numbers refer to milligrams of dosage of OxyContin and percocet, he said.

Cote said police think the man may have had a truck waiting near the interstate, which is about 100 yards from the store.

He said a white or silver pickup truck was noticed in the vicinity shortly before the robbery and that the store’s surveillance video is being reviewed.