Bill Weir of CNN was doing a live phone interview as some in the crowd climbed over a fence that had been erected on the Guatemalan side of the border, as recorded on video of Friday’s incident.

By the end of the day, migrants had established a position on the Suchiate River bridge connecting Tecun Uman, Guatemala, and Tapachula, Mexico. Facing them were “about 400 riot police and federales,” Weir told CNN.

The caravan appeared to be smaller Saturday than it had been on Friday, CBSreported, when the effort to cross the bridge was turned back. It was unclear whether migrants had resorted to other means of entering Mexico or had turned back.

On Friday, Guatemalan police allowed migrants access to the bridge.