Rush appears to have had trouble at the San Ysidro port of entry on the U.S.-Mexico border, between San Diego and Tijuana.

What happened

Reports say the crossing was disrupted when migrants rushed the border, and authorities temporarily closed traffic in both directions at San Ysidro. One report also says the eastern access point near the 905 was used when San Ysidro was shut down.

Answer in one line

The border crossing was San Ysidro in the San Diego–Tijuana area.