PHILADELPHIA (AP) -- Philadelphia police believe a man assaulted outside a pizzeria is the victim of the so-called "knockout" game. The Philadelphia Inquirer reports that a 15-year-old was arrested Thursday in the Nov. 11 attack in the city's Fox Chase section. Authorities say a 29-year-old man was kicked and punched by three or four people after agreeing to give someone a cigarette. Officer Tanya Little says police are looking closely at random attacks to see if they are linked to the game. They include the attack on a 25-year-old man knocked off his bicycle and punched Friday night in South Philadelphia. Authorities say the goal of the "game" is to knock a random pedestrian unconscious. Police in nearby Lower Merion are investigating two similar attacks.