Washington (CNN) -- A crew member aboard a U.S. Navy ship accidentally fired a machine gun into the Polish port city of Gdynia on Wednesday while cleaning the weapon, Navy officials said Friday.



Three rounds were fired from an M240 machine gun into the town but no injuries or damage were reported, officials said.



The gun, aboard the USS Ramage, a Navy destroyer, is used to defend the ship in close combat.



Navy officials said a crew member was cleaning the weapon when it accidentally discharged.



The incident happened as the ship was in port after returning from an international exercise in the Baltic Sea. It was preparing to leave later that day, the Navy said.



Polish military police boarded the ship to investigate, and Navy officials said the crew of the Ramage fully cooperated. No U.S. sailors were taken into custody by Polish authorities, Navy officials said.



There was no immediate word of a U.S. Navy investigation into the incident.
What is the gun used to defend? What were the crew members cleaning? Who was cleaning the machine gun? Were any damages or injuries reported? What is the gun used for? Which city does the machine gun fire into? What injuries were reported?
the ship in close combat. M240 machine gun A crew member aboard a U.S. Navy ship no to defend the ship in close combat. Gdynia no
question: What is the gun used to defend?, answer: the ship in close combat. | question: What were the crew members cleaning?, answer: M240 machine gun | question: Who was cleaning the machine gun?, answer: A crew member aboard a U.S. Navy ship | question: Were any damages or injuries reported?, answer: no | question: What is the gun used for?, answer: to defend the ship in close combat. | question: Which city does the machine gun fire into?, answer: Gdynia | question: What injuries were reported?, answer: no