President Trump was rushed to a secure bunker in the White House on Friday evening after a group of protesters hopped over temporary barricades set up near the Treasury Department grounds, according to arrest records and people familiar with the incident.

The security move came after multiple people crossed over fences that had been erected to create a larger barrier around the White House complex around 7 p.m.

Secret Service officers detained at least four protesters, who were charged with unlawful entry at 1600 Pennsylvania Avenue, according to arrest records. The incident took place near the border between the White House lawn and Treasury Department, about 350 feet from the East Wing, and close to a Treasury fence line that has been at the center of past security failures.

The breach occurred around the time that the Secret Service alert level on the White House complex was elevated from “yellow” to “red,” according to a law enforcement official, who, like others, spoke on the condition of anonymity to describe internal safety maneuvers. Officials familiar with the incident told colleagues that the president, the first lady and their son Barron were rushed to the bunker because of the episode, according to two people familiar with their accounts.