A heartbroken mum has shared the tragic last message her 14-year-old son sent her from a school trip before he was crushed to death by a pickup truck.

Victim Thiago Samuel Corpus had been crossing the road when a truck driven by a 20-year-old knocked him down and ran him over in Buenos Aires, the capital of Argentina, on Wednesday, 12th October.

Just two hours earlier, Thiago had sent his mother a text message saying: “I love you mum, I’m having a good time.”

The scene was reportedly so brutal that some of the boy’s classmates who witnessed the incident were violently sick.

Thiago had been with his classmates from Secondary School No. 54 in San Francisco Solano, a city in Buenos Aires province.

They were on an excursion to the Costanera Sur Ecological Reserve when he was hit by the Volkswagen Amarok pickup truck.

The driver has been named as Martin Garbini, 20, and he was arrested following the crash.

Now Thiago’s parents have called for “justice to be done”.

Monica, Thiago’s mum, said: “I want justice, that this boy does not go free because just like my son was, it could be anyone.

“And for the school, I ask that there be a sanction, at least for the director, because it was an oversight on their part.”

Thiago’s parents said they were heartbroken when they heard radio reports of their son’s death before the school had even contacted them.

They said the school told them Thiago was in hospital when in fact he had already died two and a half hours earlier.

The parents said that the school trip had been cut short when they found the ecological centre they were supposed to visit was closed.

The schoolchildren were in a nearby park when the tragedy happened.

Monica said that Thiago had been enjoying the school trip, texting her at 12.30pm that day to tell her he loved her.

Monica said: “He sent me messages at 12:30 p.m. and told me ‘Mom I love you, I’m having a good time’.

“And I told him, ‘Enjoy, son, and we’ll see each other later in the afternoon’. That’s the last message I have.”

Alberto, Thiago’s dad, said: “They didn’t say anything about the school, they didn’t give an explanation. I found out about this from his classmates. They just told us ‘sorry’.”

He added: “Thiago’s name was already being said in the news and we didn’t know anything.”

Alberto also said: “The boys are all traumatized because they witnessed it, they cried, some of them vomited and they left them at school that way.”

The investigation into the incident is ongoing. The driver has been charged with homicide.