Reports say up to 50 people have died and at least 20 injured after a road crash in eastern Guinea."A lorry... was the cause of this serious accident which has plunged numerous families into mourning," government minister Alhassane Conde said in a statement, AFP reports.The lorry was travelling from Moribadou to take passengers to a weekly market in the town of Beyla.Reports say the lorry crashed into a ravine after its brakes failed.All the victims were buried in a common grave at the accident site, reports say.The injured have been taken to hospital in Beyla, an eyewitness told Agence France Presse.