An American visitor was hit on the head with a blunt object in an attempted robbery in Par-La-Ville Park on Saturday.Police say the the 48-year-old victim and his friend were accosted by a local man near the public restroom facilities in Queen Street, at about 5.25pm.He struck one of the pair, causing a head wound which did not require hospital treatment, before a member of the public intervened. The victim’s friend, a 42-year-old man, was not injured and nothing was stolen during the incident.The suspect, a 37-year-old Devonshire man, was arrested, along with a 40-year-old Pembroke woman.