Two armed men have barricaded themselves in a bar in Barcelona's city center after a van mowed down dozens of people, El Periodico newspaper reported on Wednesday.

Several people were killed and up to 25 were injured in the Barcelona van ramming attack.

ÚLTIMA HORA Una furgoneta atropella desenes de persones a la Rambla de Barcelona https://t.co/BP4lTVHGNd pic.twitter.com/aOzsNDBkrf — Diari ARA (@diariARA) 17 августа 2017 г.

Atropello masivo en #Rambles #Barcelona Se asume atentado, decenas de víctimas. La Rambla está cerrada, el conductor ha escapado. pic.twitter.com/0MiEVJEddn — Marc Basté (@mbaste) 17 августа 2017 г.

​​The perpetrator fled the scene.

Meanwhile, El Periodico newspaper reported that the suspected perpetrator was a man of 5’7’’ wearing a white shirt with blue stripes.

​Shortly after it was reported that two gunmen broke into a restaurant in the center of Barcelona. At the same time local media reported that the suspected armed perpetrators of the attack barricaded themselves in a Turkish restaurant near Boqueria market taking hostages.

​The police is holding negotiations with the suspects.

This is how far the van traveled before it came to a stop. #Barcelona pic.twitter.com/3Z8PeODrEx — Paul Joseph Watson (@PrisonPlanet) August 17, 2017

​Barcelona police, in a tweet, told people to stay away from the center of the city due to a "large contingent of security forces and emergency services" deployed in the area.

🚩Atropello múltiple en las #Ramblas. Se solicita a los ciudadanos no transitar por la zona de Plaza Catalunya. +info @emergenciescat — Policía Nacional (@policia) 17 августа 2017 г.

​A van has crashed into dozens of people in Barcelona's city center on Wednesday. The incident has been classified a terror attack by Barcelona police.

Vanguardia news outlet has reported that two alleged armed suspects of the attack have entrenched themselves in a bar.

Graphic footage has emerged, showing wounded people on the scene of the attack.