The Argentines were identified as two 35-year-old women, Roxana Lauseda Gómez and Nadis Carolina Flores.
Some 33 people were injured, including citizens from the United Kingdom, the US, Canada, France, the Netherlands and Spain.
Witnesses said the driver tried to pass another auto when he crashed.
Only the bus was carrying 40 people.
The driver, in turn, stated that he had lost control of the bus because the road surface was too wet, insisting that he was driving at a low speed and did not interact with other vehicles.
Weather Authority: Snow to continue falling into the afternoon Sunday
Seasonable temperatures with highs in the 40s through Thursday , then another winter storm takes aim on Kansas for Friday . Winter Storm Warnings and Advisories are in effect for snow, sleet and freezing rain for this weekend.
Phil Masinga has passed away, aged 49
According to reports in the local media, Masinga had been admitted to hospital early last month with an illnesss. Buddha Mathathe‚ president of the South African Masters and Legend Football Association, said: "He is gone.
Samsung Will Launch The Galaxy S10 On Feb 20 In San Francisco
It is expected that the Samsung Galaxy S10 will use the latest and best chipset, the best cameras, the best display, etc. The cheapest of those - referred to as the Galaxy S10 Lite in leaks - should, in theory, compete with Apple's iPhone XR.
Five passengers remain in critical condition.
In addition to the dead, three Cubans and two foreigners - 42-year-old Spaniard Felicita Hurtado and French woman Marline Alphonse, 63 - were said to be in a serious condition. Their ages range from 42 to 74.
The UK Foreign Office said it was "seeking information from the Cuban authorities" and that it was "ready to assist any British people who require our help", a spokesperson told the BBC.
On top of the road being wet and winding, Cuba's highways are also known for being poorly lit, too narrow, and riddled with potholes.
More than 4,000 people have died in traffic accidents in Cuba since 2012, the BBC reported. The views expressed therein are not necessarily those of stlucianewsonline.com, its sponsors or advertisers.