European stocks extended their losses on Tuesday, as investors assessed the fallout from political instability in France, which dampened risk appetite in regional markets.

The pan-European STOXX 600 index fell 0.4% to 636.67 points, after declining 0.8% in the previous session, while the French CAC 40 index dropped 0.3%.

Late on Monday, French authorities imposed curfews in parts of several cities, including Paris, Lille and Nice, following a weekend of rioting and looting amid anti-government protests that have spread across the country.

The protests have increased pressure on the eurozone's second-largest economy, which is facing weak economic growth and mounting government debt. The unrest also highlights the challenges the government faces in reducing its large budget deficit.

In other stock markets, investors assessed a range of corporate earnings reports.

Shares in French cloud computing services company OVH Cloud jumped 8.5% after it announced its first positive net free cash flow after accounting for financing costs since its listing on the stock exchange in 2021, coinciding with a 7.2% increase in revenue to €1.15 billion ($1.29 billion) during the financial year ending in August.

In contrast, shares of Barco fell by 12.9%, after the visual display technology company predicted that its sales for the full year would be slightly lower than last year's levels, with an EBITDA margin of around 11%.