One picture shows woman on her feet cheering in front of her wheelchair

It is feared concession tickets being taken by people not genuinely disabled

Overcome with excitement during Brazil’s opening game of the World Cup, two fans jump to their feet for a better view.

The reaction would have been totally innocuous – had they not been sitting in wheelchairs moments earlier.

Authorities in Brazil are investigating after pictures emerged of dozens of supposedly disabled fans standing up during matches.

With tickets few and far between, it is feared the concession seats are being sold on the black market, denying the spots to those who genuinely need them.

Police investigation: This photo is one of 22 images handed over to Brazilian detectives showing a woman in a wheelchair jumping up to celebrate a goal during a match in Sao Paulo during the World Cup

Before the World Cup started, Fifa released cheaper tickets specifically for pensioners, students and disabled fans.

But fans have taken pictures of youths and apparently able people occupying the seats.

The photographs have been uploaded on to social media sites, where they have spread across the world.

In Brazil, it is a criminal offence to sell a ticket for more than face value, with touts facing four years in prison if caught.

Despite this, many have been caught selling tickets illegally at grounds and on sites like Facebook.

The tickets are being bought in some cases for up to £1,000 for a game, which is as much as ten times their face value.

Disabled spots are thought to be particularly valuable because they come with a free extra ticket so wheelchair-users can come with a companion.

Among the pictures which have been uploaded online, some were taken at the opening game of the tournament in Sao Paulo, between Brazil and Croatia.