French opposition parties have said they will not back Prime Minister François Bayrou after he called a vote of confidence on 8 September on plans for deep budget cuts, BBC reported.

Bayrou, who has led a minority government since last December, called the vote on Monday, warning France was facing a "worrying and therefore decisive moment". "Yes, it's risky, but it's even riskier not to do anything", he said, in the face of France's mounting budget deficit.

From the National Rally on the right to the Socialists, Greens and France Unbowed on the left, opposition parties lined up to say they would vote against him, according to BBC.

Bayrou called the vote two days before protests have been called across France to "block everything".