A passenger jet crash-landed Monday on a desolate stretch of road in northwest Russia, killing at least 38 people, the country’s state news agency reported. The plane reportedly took off from Moscow and contained 48 passengers and five crewmembers. It is unclear what brought the plane down about 2 miles from Petrozavodsk airport, its destination, reported Itar-Tass. But the Tupolev-134 plane caught fire and the fuselage was reportedly completely destroyed. Those injured were considered in serious condition. Authorities began an investigation into the crash; early signs point to a mechanical error, Itar-Tass reported, citing a source.