ATHENS (REUTERS) - Greek Prime Minister Alexis Tsipras, mounting a last-ditch bid to salvage an aid deal with creditors, will address the European Parliament on Wednesday, a Greek government official said.

The premier, mounting a last-ditch bid to salvage an aid deal with creditors, will also address the European Parliament on Wednesday, a Greek government official said.

He was scheduled to meet German Chancellor Angela Merkel and French President Francois Hollande before an emergency summit of euro zone leaders on Tuesday, a Greek government official said. The official gave no further details. The euro zone summit is due to begin at 12 Tuesday midnight Singapore time in Brussels.

Meanwhile, Eurogroup chair Jeroen Dijsselbloem said the Eurogroup of euro zone finance ministers will hold a conference call on Wednesday to discuss an expected Greek request for a medium-term loan from the European Stability Mechanism (ESM).

Indicating why it had not been possible to have that discussion at Tuesday's Eurogroup meeting in Brussels, he added that the ministers were waiting for a new letter from the Greek government that presented a single, clear set of proposals.

But, Greek officials rejected the suggestions saying they had submitted credit proposals to euro zone partners based on those it put forward last week.

(This story is developing)