The train collided head-on with another train while on a test run just outside Chile's capital of Santiago

Investigations were underway to determine the cause of the crash

The impact of the crash was such that it vaulted one train on top of a car from the other train

The eight-car freight train, which was carrying 1,346 tonnes of copper, was also packed with people

While the other train had 10 workers on board operating a speed test, the state rail company said

Authorities were yet to declare the identity of the two people killed in the incident

The nine injured included four Chinese nationals who were receiving treatment at hospitals near the crash site in San Bernardo, Chile

"We have to identify what the causes are and take the corresponding measures," Transportation Minister Juan Carlos Munoz told The Associated Press