A bomb went off in a branch of the Perekrestok supermarket, injuring at least 13 shoppers. Investigators say the device was homemade and packed with shrapnel.
British news media report that MI5 uncovered a plot to kill Theresa May in a suicide attack on No. 10 Downing St. Reports say two suspects will be appearing in court on Wednesday.
Despite Tuesday's terrorist attack the mayor decided not to cancel Sunday's race, and the NYPD is increasing the number of officers and other safety measures along the course, and around the city.
The president also said he'd consider sending suspect Sayfullo Saipov to the Guantanamo Bay detention center, though he seemed to backtrack from this position in tweets Thursday.
Prosecutors say Sayfullo Saipov left a note declaring he drove onto a bike path in Manhattan in the name of ISIS. Eight people were killed. Saipov was shot by a police officer and is recovering.
The Islamic State began urging supporters to carry out vehicle attacks last year. Europe, where weapons are harder to obtain, has suffered multiple attacks. Now New York has been hit.
The Las Vegas shooting has again raised questions about domestic terrorism. The Patriot Act provides a definition, but because there are no actual criminal charges, some prefer not to use the term.
Most in the terrorist cell were employed or in school and showed no signs of radicalization. Their skill at avoiding detection sends chills down the spines of authorities working to prevent attacks.