The Madrid mayor said at least two people died from the blast, and that initial information showed the blast was likely caused by gas leak.

At least two people have been killed in an explosion that caused the partial collapse of a building in central Madrid on January 20 and provoked a fire inside, Mayor Jose Luis Martinez-Almeida told reporters.

He said initial information pointed to a gas leak that likely caused the blast.

Madrid’s emergency services say rescue teams, firefighters and police are working in a central area of the Spanish capital following an explosion that witnesses described as “extremely loud”.

Videos and images shared on social media showed a tower of smoke coming out from a building and rubble scattered in a central street of Madrid. Spanish public broadcaster TVE said the explosion took place in a building near a nursing home.

Leire Reparaz, who lives near the Puerto de Toledo, a local landmark, told The Associated Press that she heard a loud explosion.

“We didn’t know where the sound came from. We all thought it was from the school. We went up the stairs to the top of our building and we could see the structure of the building and lots of grey smoke,” the 24-year-old Madrid resident said.

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