A Greek debt restructuring is "neither necessary nor desirable," the head of the central bank said on Monday as he called for faster structural reforms to keep up with the country's obligations.

An envoy of embattled Libyan leader Muammar Gaddafi is meeting Greek officials on Thursday ahead of an emergency European Union summit in Brussels convened over the Libyan crisis, an AFP reporter said.

A private plane belonging to embattled Libyan leader Muammar Gaddafi with unknown passengers aboard crossed Greek airspace en route to Egypt on Wednesday, a Greek defense ministry source said.

The trial of 13 suspected members of a Greek radical anarchist group that has staged bomb attacks against state buildings and foreign embassies opened Monday in a high-security prison in Athens.

A bomb exploded outside the Swiss Embassy in Athens on Tuesday, a spokeswoman for the embassy said.

Greece on Wednesday outlined plans to sell stakes in state-owned railway, water and real estate companies as part of a drive to raise billions of euros to help restore its ailing public finances.