A lawyer says a Frenchman suspected of helping his brother plot attacks against Jewish school children and paratroopers knew nothing about what was going on.

French prosecutors have filed preliminary murder and terrorism charges against the brother of a gunman who killed Jewish schoolchildren and paratroopers in attacks that stunned the country.

The Paris prosecutor’s office has opened a judicial inquiry into whether the brother of a radical gunman who killed seven in southern France was complicit in preparing terrorist acts.