Entertainers from Cirque du Soleil are due to perform on the London Eye today as they announce their return to the Royal Albert Hall in January next year.
Cirque du Soleil began with a group of 20 street performers in Québec in 1984 and to date, their performances have been seen by over 100 million spectators worldwide.
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Thousands of passengers now face delays, with Southeastern trains warning "all services" would be affected.
Paramedics attended a scene in Willesden, north-west London, on Monday afternoon where they found the teenager with stab wounds.
At least five people have suffered minor injuries but the cause of the blast is still unknown.