UN Secretary General Ban Ki-moon has pledged to find "the truth" of the alleged chemical weapons attack in Syria as his team is to visit the Damascus suburbs today. Speaking to a press conference, Mr Moon said that it was "clearly a major and terrible incident".
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The man, in his thirties, was found with stab injuries on the upper deck of a bus in Handsworth, Birmingham, on Monday night.
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.