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A series of sick Twitter posts from racist trolls celebrating the 150 tragic deaths of the Germanwings plane crash are being investigated by police.

Following yesterday's crash, when the doomed Airbus smashed into the French Alps after plummeting from 38,000 feet, Spanish Twitter users published messages celebrating the deaths of Catalans on board.

In a horrifying post, one user wrote: "The accident seems like a good idea to me if there were Catalans in it."

For the latest updates on the crash follow our live blog

(Image: Getty)

Another wrote: "A plane full of Catalans and Germans that crashes in France. #Winwinwin."

Catalans are an ethnic group based predominately in northern Spain - including Barcelona, where the flight set off - with more than seven million among their population in the country.

Many campaign for the region to be separated from the rest of Spain - a source of intense political debate throughout the country.

(Image: Reuters)

In another post, a separate user wrote: "Hang on, hang on, let’s not make a drama out of it, there were Catalans on the plane, not people."

Spain’s Home Secretary Jorge Fernández Díaz has demanded an investigation.

A spokeswoman for his office said: "The Home Secretary has ordered an immediate investigation to uncover the origin of those tweets."

The tweets have since been deleted.

The cause of the crash is still being investigated, with one theory stipulating that it was caused by the windscreen cracking - leaving the piloting team on board without oxegen.

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The doomed flight disappeared from radar 45 minutes after leaving Barcelona in Spain for Düsseldorf in Germany on Tuesday morning.

It is thought it plunged for eight minutes before smashing into the French Alps.

Of the 150 on board, the tragic crash had no survivors, authorities have confirmed.