Incredible images show a 300 foot high WALL OF SAND sweep through a festival causing 20,000 revellers to be evacuated

• The sandstorm swept through Sonid Right Banner, Inner Mongolia
• 20,000 people at traditional Naadam Festival were evacuated
• Sandstorm lasted for 30 minutes before a rain shower cleared the air
• No one was injured in the potentially fatal incident yesterday
• It is the latest in a series of sandstorms to hit the region this year 

By Emily Chan For Mailonline

Published: 09:00 EST, 29 July 2015 | Updated: 12:10 EST, 29 July 2015

A massive sandstorm hit Sonid Right Banner, Inner Mongolia, yesterday afternoon.

It engulfed thousands of revellers celebrating Naadam, the region's biggest festival of the year.

The sky darkened as the 300-feet high wall of sand was seen sweeping through the area, reported the People's Daily Online.

The sky darkened as the massive sandstorm swept through Sonid Right Banner in Inner Mongolia yesterday

More than 20,000 people were attending celebrations for Naadam, a traditional festival of games, in the area

Revellers had to be evacuated as the 300-feet high wall of sand hit the festival site. Luckily no one was injured

Naadam is a traditional festival of games celebrated each year in Inner Mongolia.  

More than 20,000 people were attending the celebrations and had to be evacuated from the area.

Luckily, there were no injuries or deaths. 

The sandstorm lasted for about 30 minutes before a sudden rain shower cleared the air.

A number of sandstorms have hit northern China this year, adding to the serious pollution problem blighting cities in the country. 

In April, incredible photographs showed how a massive sandstorm engulfed Golmud, a city in northwest China.

The sandstorm lasted for 30 minutes before a rain shower cleared the air, allowing celebrations to continue 

It is the latest in a series of sandstorms to hit the region, which have affected provinces across northern China

The red sand also swept across the regions of Xinjiang, Inner Mongolia, Gansu, Ningxia and Shaanxi, in what was the fourth sandstorm to hit the region this year.

Beijing was also plagued by red dust in one of the most severe sandstorms to hit the city in over a decade.

Sandstorms are usually caused by strong winds blowing over desert regions, lifting vast amounts of sand and dust into the atmosphere. 

In April, a raging sandstorm engulfed the city of Golmud, north west China, in the fourth storm to hit the region

Golmud was left covered in a remarkable red haze when the sand cloud blew across the city earlier this year

They can cause serious breathing problems, particularly for people with pre-existing conditions such as asthma.

They are also known to cause traffic accidents because of reduced visibility.

Experts have not been able to agree on exactly why there have been a spate of sandstorms across the world so far this year, including countries such as Belarus and Israel.

Some experts have suggested that climate change may be a factor, while others say the number of dust storms experienced across the decades has always been variable.