article_snippet: Hundreds of people have taken to social media to pay tribute to the four people who died.
article_snippet: Superintendent Chris Curtis said: 'This is a tragic incident and our thoughts are with the families at this difficult time.
article_snippet: our are working with South Wales Police in order to provide support to the families affected and also the communities the families affected live within. '
article_snippet: our will work with partners to ensure that a tragic incident is fully investigated.'