The French prime minister's office has admitted to tipping off prosecutors about possible leaks to the website Mediapart - whose offices police attempted to search on Monday.
It's generated a major row about the journalists' right to keep their sources private - in a case that could prove very embarrassing to the French President.
Elena Casas reports from Paris.

Russian air strikes kill 10, injure more than 50 in Ukraine's Kyiv
Firefighters battle wildfire in southern France
US, Iran talks conclude in Doha, focused on Strait of Hormuz
Trump honours Theodore Roosevelt in North Dakota, debuts new Air Force One
Kenyan court charges 8 schoolgirls with fellow students' murder
At least 5 people killed in fire in Antwerp apartment block
Three people die in Mexico World Cup celebrations as fans crowd streets
After Venezuela quakes, citizens lead rescues amid military theft accusations
