On 15 September 2017, at around 08:20 BST, an explosion occurred on a District line train at Parsons Green Underground station, in London, England. Thirty people were treated in hospital or an urgent care centre, mostly for burn injuries, by a botched, crude "bucket bomb" with a timer containing the explosive chemical TATP. Police arrested the main suspect, 18-year-old Iraqi asylum seeker Ahmed Hassan, in a departure area of the Port of Dover the next day, and subsequently raided several addresses, including the foster home of an elderly couple in Sunbury-on-Thames where Hassan lived following his arrival in the United Kingdom two years earlier claiming to be an asylum seeker.

Parsons Green is an above-ground London Underground station on the Wimbledon branch of the District line that opened in 1880. It is between Fulham Broadway and Putney Bridge stations and is in Zone 2. There are entrances on Parsons Green Lane and in Beaconsfield Walk. The station is a short distance north of the green itself. It was previously a train-operator depot, until functions were transferred to Earl's Court.