"The June 3, 2017 attack in London--in which eight people were killed and nearly 50 injured--was the third terrorist incident in the United Kingdom in the last few months. Five people were killed outside the UK parliament in March in a similar car and knife attack, and in May, a suicide bomber killed 22 people and wounded 116 at a music concert in Manchester. These incidents are among a string of terrorist attacks in Europe connected to or inspired by violent Islamist extremism, with many since 2014 linked to the Islamic State group (also known as ISIS or ISIL)."
CRS Insight, IN10209
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html