Madrid-Barajas Airport has descended into chaos as fights break out at passport control and long queues build. Sources told local media that the problem is happening in Terminal 4 as passengers fear they might miss their flights. 

Aena, a state-owned body in Spain that operates a network of airports in the country, said that it is working with police to control the flow of people. 

FOLLOW OUR LIVE BLOG BELOW FOR MORE UPDATES.