NEW : European leaders are expected to hear concrete details about how the plan might work at a European Council meeting Sunday . Greek lawmakers pass new tax cuts despite protests . Clashes break out in Athens between different groups of protesters and police . One protester dies after cardiac arrest , Greek officials say . European Union leaders worry that Greek debt threatens the euro .
NEW : Greek lawmakers pass new tax cuts despite protests . Clashes break out in Athens between different groups of protesters and police . One protester dies after cardiac arrest , Greek officials say . European Union leaders worry that Greek debt threatens the euro .