Two American tourists have been stabbed in a knife attack near one of Europe’s most famous tourist attractions. Greek police said a man attacked a Greek-American couple near the entrance to the Acropolis Museum, which sits below the ancient hilltop citadel and its 2,500-year-old Parthenon temple. The woman suffered minor injuries, while the man was more seriously wounded and taken to a hospital by ambulance. His identity has not been released, and officials said he appeared to be suffering from psychological problems. Investigators are also examining reports that emergency dispatchers received a call shortly before the attack about a man holding a knife and threatening passersby near the museum entrance.