UK raises terror threat to severe after Liverpool hospital blast

The United Kingdom has stepped up its terror threat level following a blast in a taxi outside Liverpool Women's Hospital. It has been declared a "terrorist incident" and four people have been arrested However, the motive remains unclear and police are investigating any links to Remembrance Day events near the hospital. Al Jazeera's Nadim Baba's reports. – Follow us on Twitter: https://twitter.com/AJEnglish/ – Find us on Facebook: https://www.facebook.com/aljazeera/ – Check our website: https://www.aljazeera.com/ #UK #Liverpool
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