The Massachusetts State Police bomb squad exploded a pipe bomb Saturday on the Brant Rock Esplanade in Marshfield, State Fire Marshal Stephen Coan said. Someone reported a “suspicious object” in the 250 block of Ocean Streetshortly before 5 p.m., and Coan said the bomb squad identified the object as a pipe bomb. “It was so sensitive to shock that it went off and functioned as a pipe bomb is designed to, to set off and cause damage,” he said. There were no injuries or property damage, and an evacuation order had been lifted as of about 7:15 p.m. The incident is not believed to be related to the pipe bomb found in Worcester Friday, Coan said. The state fire marshal’s office and Marshfield Police were investigating.Anne Steele can be reached at firstname.lastname@example.org. Follow her on Twitter @AnneMarieSteele. Globe correspondent Gal Tziperman Lotan contributed to this report.