London (London Bridge)
Date of attack: June 3, 2017
Number of casualties: Eight people were killed and more than 40 wounded
What happened: Three men drove a van into pedestrians on London Bridge before going on a stabbing rampage at bars at nearby Borough Market. They were shot dead by police.
Inside the van, police found two blowtorches as well as what appeared to be 13 Molotov cocktails. The van also had office chairs and a suitcase. Police believe the attackers told relatives they were using it to move.
Why it happened: Police named the attackers as Khuram Shazad Butt, 27; Rachid Redouane, 30; and Youssef Zaghba, 22.
Butt is believed to have associated with the outlawed radical Islamist group al-Muhajiroun, co-founded by notorious hate preacher Anjem Choudary. Counter-terrorism sources told CNN he was was considered a potential threat to British security and was still under active investigation at the time he carried out the deadly assault.
In a raid of an east London apartment rented by Redouane, police found an English-language copy of the Koran opened at a page describing martyrdom and materials that may have been used to make the Molotov cocktails.
ISIS claimed responsibility for the attack, although the group provided no evidence for its involvement or details of the attack.