article_snippet: Scroll down for video .
article_snippet: A bunch of flowers were left on the side of the A470 where the crash took place on Friday night .
article_snippet: More than 40,000 cubic metres of discarded rock, shale and mud covered the village in minutes, and the classrooms at Pantglas Junior School were swallowed by the mud slide - crushing and suffocating the school children and teachers inside.
article_snippet: as does everyone caught up in the tragedy.
article_snippet: Seven teenage boys, aged 17 and 18, have been arrested on suspicion of dangerous driving and bailed by police.
article_snippet: our will work with partners to ensure that a tragic incident is fully investigated.'