(CNN) Department of Homeland Security officials said Monday that they started to get information from "multiple sources including individuals in the Mexican government" of potential waves or groups of individuals who were discussing an incursion into legal ports of entry in California by attempting to pass through vehicle lanes.

The officials briefed reporters that the information led to Customs and Border Protection to suspend northbound traffic for about three hours at San Ysidro in San Diego, California, to "add more control measures." San Ysidro is now operating with 15 vehicle lanes of traffic, down from 23 on Sunday and 26 on most regular days.

One Homeland Security official acknowledged that the additional measures may increase wait times for "legitimate trade and travel."

The Mexican government also deployed resources in Otay Mesa and San Ysidro as precautionary measure, said the officials.

"All of these measures we have had to take to address the caravan has had an impact on the border environment," a Department of Homeland Security official said.

Read More