A group of thousands of migrants who have set off on foot for the United States from southern Mexico is steadily growing in size.
Its organiser says around 7,000 people now make up this migrant caravan, up from 5,000 just days ago.
Most of them are from Central and South America, local aid groups say.
US President Joe Biden is due to meet leaders from the region on Friday to discuss how to curb the flow of migrants to the United States.
