MEXICO CITY—Authorities in the troubled Caribbean resort of Playa del Carmen said Thursday they found the bodies of four men dumped near a housing development. The prosecutors office in the state of Quintana Roo said the mens’ bodies did not show signs of bullet wounds, so it was unclear how they died. But the fact the bodies were dumped together in the shrubs beside an access road suggested a gangland-style killing. Playa del Carmen has been hit by several instances of violence, most recently in January, when two Canadians were killed at a local resort, apparently because of debts between international drug and weapons trafficking gangs. There have been a series of brazen acts of violence along Mexico’s resort-studded Mayan Riviera coast, the crown jewel of the country’s tourism industry. In November, a shootout on the beach of Puerto Morelos, just north of Playa del Carmen, left two suspected drug …