Nine people were arrested in downtown Boston on Saturday afternoon for alleged drinking in public and disturbing the peace, police said. Police found a group of people sitting inside the park near the Chinatown Gate at 5:10 p.m., and police said two of them appeared to be asleep, two were engaging in a loud argument, and the others were sharing cans of beer and a pint of vodka. Other people in the area were alarmed by their actions, police said, so officers asked the individuals — who were in their 40s and 50s — to tone down their behavior. But the group continued being disruptive, so arrests were made, according to police. Seven of those arrested were from Boston; the others were from Raynham and Cambridge.