hello and welcome. there been an appeal for calm in the welsh capital, cardiff, after two teenage boys died in a traffic accident last night. the incident was followed by a riot in the ely area of the city. the two boys who died have been named locally as 16 year old kyrees sullivan and 15 year old harvey evans. bbc verify has verified cctv video appearing to show a police van following two people on either a moped or electric bike apparently minutes before a crash in which two teenagers died. the team at bbc verify has been taking a look at some of the footage that s been circulating following the riots. they ve verified the following cctv video which appears to show a police van following two people on a bike or moped apparently minutes before the crash which killed two teenage boys. live now to our correspondent in the newsroom, nick. we are expecting a news conference had to get more detail from police but bring us up to speed what we know so far. we but bring us up to sp
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