At least 27 Russian tourists were injured on November 26 in a bus crash in the eastern part of the Dominican Republic near the town of Higuey.
The Russian Embassy in Venezuela said that 39 of the 41 passengers on the bus were Russian nationals.
At least 27 Russian nationals are receiving medical treatment in the country's hospitals, Anex Tour travel agency told the Russian state TASS news agency.
Local Listin Diario newspaper reported at least 15 Russians remain in critical condition.
The bus was en route to the airport when it crashed into a truck, overturning as a result of the collision.
A video posted on YouTube showed the bus lying on the driver's side diagonally on the highway blocking rear traffic from advancing on the road.
Officials said some people remained trapped for several hours and lost limbs, the AP reported.
Eight children were among the injured.