A baby born after his parents were killed in a New York car crash has also died, according to CBS New York.
Doctors had delivered the baby shortly after his seven-months pregnant mother, 21-year-old Raizy Gauber, died in a hit-and-run collision whilst being driven to hospital.
More top news
Paramedics attended a scene in Willesden, north-west London, on Monday afternoon where they found the teenager with stab wounds.
The popular game relies on Google Maps, a problem in South Korea as those functions are limited by the government.
A Met Office warning covering much of England and south-east Wales is expected to remain in place until 11am.