CCTV pictures have also been released of Samuel Guidera visiting a corner shop before he was stabbed.
After leaving the store, he walked towards the bus stop on Newlands Park, where he was attacked.
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Hundreds of passengers were ordered to leave the terminal building and flights grounded after passengers suffered difficulties breathing.
Council leaders today called on the government to provide extra money to help resettle the youngsters in the capital.
An eyewitness said: "It was very unnerving. It was just after 12pm and there were suddenly police vans and cars everywhere."