Heathrow Airport's Terminal 3 was the scene of a pepper-spray attack and suitcase theft on December 7, leading to multiple arrests.The incident affected 21 people, including a 3-year-old child, with five requiring hospitalization for non-life-threatening injuries, and caused significant travel disruptions.Metropolitan Police arrested two additional suspects, a 24-year-old man and a 23-year-old woman, yesterday after an initial suspect's release, confirming the event was not terrorism-related.