High winds have caused a section of wall the United States government is building on its southern border to blow over into Mexican territory.
The 40-metre section of steel panels from the fence in Calexico, California fell into the town of Mexicali on the Mexican side of the border on Wednesday morning.
Construction workers were later seen on Wednesday removing damaged sections of the wall, as Mexican police closed the road running next to the border.
Winds of up to 48 kilometres per hour were reported at the time, the US National Weather Service said.
The concrete used to anchor the fallen wall section had not yet set, local media reported.
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It came a day after US President Donald Trump boasted during a re-election campaign event in New Jersey that the wall was "going up at record speed”.
The Trump administration has constructed nearly 160 kilometres of border wall, according to US Customs and Border Protection statistics as of late December.
All of those barriers replaced existing structures, the agency said.
Mr Trump has vowed to build at least 644 km of wall along the border by November this year, when he will be up for re-election.
In his successful 2016 campaign, Mr Trump said Mexico would pay for the wall.
The Mexican government has refused to do so.
