Germany's Transport Minister has described the scene of the Bavaria train crash as "horrifying" and "shocking".
Speaking at a news conference in Bad Aibling, close to where the collision happened, he explained that the front carriages of the trains were ripped in two after impact.
The trains had been travelling at around 100 kilometres per hour (62mph) when they hit each other head-on.
He added that it was unclear whether the crash was a result of technical or human error.
Two of three black boxes have now been found and the evidence will be analysed.
Voters have headed to the polls in New Hampshire in the latest round of US presidential elections.
Earlier Trump repeated an insult from a supporter calling his Republican rival Ted Cruz "a p**sy" for his stance on waterboarding.
The first-in-the-nation primary sees Donald Trump and Bernie Sanders in the lead.