Two small migrant children appeared to be dropped from the Mexico side of the border into the Arizona side by a suspected smuggler, according to surveillance footage provided by the U.S. Customs and Border Protection (CBP) on Monday.
One child and his mother got over the fence and ran up the hill behind.
Thousands of migrants, mostly Hondurans, have joined caravans in recent weeks in an effort to speed across Mexico to request refuge at the USA border.
Reuters reported that other migrants managed to squeeze through the fence on the beach. According to Reuters, numerous "frustrated and exhausted" immigrants quickly surrendered to the U.S. Border Patrol, hoping that once in the U.S.
"We're just observing, waiting to see what happens", Mayeni said.
The migrants in Tijuana are part of several caravans that traveled through Mexico in an effort to enter the United States, citing issues such as widespread violence and dismal job prospects in their home countries.
Ninety minutes later, she and her family were over the fence. "We'll figure out what to do in a couple of days".
A young man sits on top of a building at a new migrant shelter on Sunday in an area known as El Barretal, in Tijuana, Mexico.
U.S. officials have restricted applications through the Chaparral gate in Tijuana to between 40 and 100 per day. Mexican authorities arrested and deported those they considered responsible for compromising the city's commitment to public order.
The remaining migrants were taken by bus to the new shelter about 10 miles (15 kilometers) from the border crossing at Otay Mesa and 14 miles (22 kilometers) from San Ysidro, near where people line up to file applications for asylum in the United States.
The commissioner added that these scenarios are being played out every day at the border.
"They see what we have here, so they're trying to do the same thing", local resident Mary Juarez, who lives in the neighborhood next to the fence opening, told KVIA. "It's a huge challenge that we need to work with Congress to address.We've got criminal organizations profiting off of vulnerable families, charging $5000-$7000 per person".
McAleenan said the United States was looking forward to working with the new president of Mexico to address the problem.