A <a href="https://en.wikipedia.org/wiki/2017_Westminster_attack" id="mwAak" rel="mw:WikiLink" title="2017 Westminster attack">terrorist attack</a> in London near the <a href="https://en.wikipedia.org/wiki/Parliament_of_the_United_Kingdom" id="mwAao" rel="mw:WikiLink" title="Parliament of the United Kingdom">Houses of Parliament</a> leaves four people dead and at least 20 injured.