Dublin's four local authorities have issued a plea to citizens in the capital to 'redouble' efforts to stop the spread of Covid-19.

The call was made in an open letter signed by the elected leaders of Dublin City Council, Dun Laoghaire/Rathdown, South Dublin and Fingal councils.

The Dublin Mayors and the chairperson of Dun Laogharie/Rathdown called on Dubliners to work together to lower case numbers and to reduce social contacts to limit the numbers being admitted to hospital.

A radio and digital campaign has also been launched to change the behaviour of 15-34 year olds in Dublin towards the virus.

''We have got to view Covid as a dangerous enemy and work together to stop it sweeping through our communities and affecting the lives of our loved ones, neighbours, colleagues and friends'' the letter stated.