Eighteen people are dead after a truck carrying stones used for pavement ran into a passenger bus in an outlying area of Moscow.
Twenty-five other people were injured in the crash, the emergency services ministry said in a statement. It did not state the severity of the injuries.
The accident occurred when the truck ploughed into the side of the bus near Oznobishino, a settlement in the Moscow municipality about 25 miles south of the city centre.
Russian news reports say the drivers of both vehicles are among those in hospital.