A new Covid-19 cluster with at least 12 confirmed cases involving foreign construction workers has been detected in Setia Alam, Selangor, said Datuk Dr Noor Hisham Abdullah.br br The Health director-general said that in a statement on Saturday, adding that the three Bangladeshi nationals who tested positive for Covid-19 lived in shared accommodation together with 18 others, triggering an immediate tracing exercise of the trio’s close contacts.