BRUSSELS, March 24 (Reuters) - Euro zone countries have not yet agreed on a safety net to help heavily indebted Greece and are still discussing whether to meet on the issue on Thursday before an EU summit, European Union diplomats said.
They also said the 16-country euro zone was still discussing whether to involve the International Monetary Fund in any standby aid package for Greece, which wants to reassure financial markets over its debt problems.
"There is still no agreement," one diplomat said. (Reporting by Julien Toyer, Ilona Wissenbach, and Timothy Heritage; editing by Dale Hudson)