Latest: US Defence Secretary Jim Mattis has reacted to North Korea's latest nuclear test by saying threats to the United States and its allies "will be met with a massive military response".

Eurozone politicians are not obliged to rescue Greece as the country is no longer of systemic importance to the euro, a senior member of German Chancellor Angela Merkel’s party has said.

A fresh referendum giving the Oireachtas more powers of inquiry is being considered by the Taoiseach, after his plans to have TDs and senators investigate the banking collapse in a committee failed to fully satisfy senior ministers.