A portion of a multi-level luxury shopping centre in Mexico City has collapsed, sending debris flying and kicking up clouds of grey dust, television images showed.
No deaths or injuries were immediately reported at the site, Mexico's civil protection agency said.
The shopping centre, called Artz Pedregal, in the south of the capital opened in March, according to local media.
Mexico City's head of civil protection Fausto Lugo said that the cause was structural, but that experts would need to investigate whether the specific problem related to its design, construction or materials.
He added that the centre had all its permits in order.
Mexican planning officials developed a building code with strict safety standards after a 1985 quake toppled hundreds of buildings in Mexico City.
Even so, a 7.1 magnitude earthquake last September caused dozens of buildings to collapse and killed about 370 people in the capital and surrounding states, raising concern over Mexico's construction codes and practices.
