Police were on standby last night fearing more riots after CCTV emerged of officers following two boys on an electric bike moments before the teens died in a crash.
South Wales Police referred themselves to the Independent Office for Police Conduct over the deaths of Kyrees Sullivan, 15, and Harvey Evans, 16, in the Ely area of Cardiff at around 6pm on Monday.
Their deaths triggered a night of riots as rumours of a police chase spread on social media.
