Madrid Blast Kills 2; Apparently Linked To Gas Leak: Mayor The first images and footage shared on social media showed a tower of smoke coming out from the six-story building and rubble scattered in Toledo Street, near the city center. AP Associated Press (AP) 2021-01-20T21:59:52+05:30 Madrid Blast Kills 2; Apparently Linked To Gas Leak: Mayor outlookindia.com 2021-01-20T22:01:26+05:30 A powerful explosion apparently caused by a gas leak ripped the facade off a residential building in central Madrid on Wednesday, killing two people and injuring at least two more, according to the mayor. The first images and footage shared on social media showed a tower of smoke coming out from the six-story building and rubble scattered in Toledo Street, near the city center. Emergency crews could be seen aiding several people on the ground.