PARIS, Sept 6 (Reuters) - France has expressed solidarity with Russia but wants all "necessary information" about Moscow's handling of the Beslan school seizure, French Prime Minister Jean-Pierre Raffarin said on Monday. In comments similar to remarks by the European Union's Dutch presidency which triggered a diplomatic row with Moscow at the weekend, Raffarin said France constantly reminded Russia of the need to respect human rights. Responding to a call from Socialist party leader Francois Hollande for French authorities to demand an "explanation" from Moscow, Raffarin said in a live debate on RTL radio: "We have already done so."