Frances highest court has ruled that US agrochemical giant Monsanto had not told the truth about the safety of its best-selling weed-killer, Roundup.

The court confirmed an earlier judgment that Monsanto had falsely advertised its herbicide as "biodegradable" and claimed it "left the soil clean".

The company was fined 15,000 Euros (£13,800; $22,400). It has yet to comment on the judgment.

Roundup is the worlds best-selling herbicide.

Monsanto also sells crops genetically-engineered to be tolerant to Roundup.