Just weeks after European leaders tamped down a banking crisis in Cyprus, troubles in the euro zone have again reared their head, this time in Portugal.

In an address to his beleaguered nation on Sunday, Prime Minister Pedro Passos Coelho warned that his government would be forced to cut spending more and that lives “will become more difficult” after a court on Friday struck down some of the austerity measures put in place after a bailout package two years ago.

The renewed tension in Portugal raised the threat of further trouble elsewhere in the euro zone, where ailing members have struggled to rebuild economic growth after enduring wrenching spending cuts.

“The risks in the euro zone have increased markedly over the past six weeks or so,” wrote Nicholas Spiro, managing director of Spiro Sovereign Strategy, a London-based consultancy that assesses risk on sovereign debt.