Footage has emerged from Mexico City of scores of volunteers helping authorities to rescue victims of Tuesday's 7.1 magnitude quake by forming a human chain.<br /><br />The video, captured on September 19, shows people removing debris and transporting it in barrels following the collapse of a building in the area. <br /><br />Authorities dug through rubble early Wednesday, searching for survivors. At least 248 are confirmed dead.<br /><br />++CLIENTS PLEASE NOTE: THIS VIDEO HAS BEEN LOOPED++
