The Latest: US officials say 69 migrants arrested in clash

A migrant woman helps carry a handmade U.S. flag up the riverbank at the Mexico-U.S. border after getting past Mexican police at the Chaparral border crossing in Tijuana, Mexico, Sunday, Nov. 25, 2018, as a group of migrants tries to reach the U.S. The mayor of Tijuana has declared a humanitarian crisis in his border city and says that he has asked the United Nations for aid to deal with the approximately 5,000 Central American migrants who have arrived in the city. (AP Photo/Ramon Espinosa)

Migrants cross the river at the Mexico-U.S. border after getting past a line of Mexican police at the Chaparral crossing in Tijuana, Mexico, Sunday, Nov. 25, 2018, as they try to reach the U.S. The mayor of Tijuana has declared a humanitarian crisis in his border city and says that he has asked the United Nations for aid to deal with the approximately 5,000 Central American migrants who have arrived in the city. (AP Photo/Ramon Espinosa)

The Latest on migrants at the U.S.-Mexico border (all times local):

9:30 a.m.

U.S. Customs and Border Protection Commissioner Kevin McAleenan says 69 migrants were arrested on the California side of the border after trying to cross from Tijuana to the U.S. during a confrontation where agents fired tear gas.

He says nearly 1,000 people rushed vehicle lanes and went around the border crossing to try to get into the U.S. on Sunday. He says some threw rocks and bottles at U.S. agents, but there was no report of violence Monday.

McAleenan says the Border Patrol's use of force policy allows agents to use tear gas, but the incident would be reviewed. He said the "dangerous situation" was resolved without serious injury.

Mexico's National Migration Institute said that 98 migrants were being deported after they tried to breach the U.S. border.

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12:20 a.m.

Mexico is pledging to shore up security near its border with the United States after local authorities arrested 39 migrants following a peaceful march that devolved into chaos.

Mexico's Interior Ministry said Sunday it would immediately deport those who tried to "violently" enter the U.S. from Tijuana. Meanwhile, Tijuana's municipal government says that more than three-dozen migrants were arrested for disturbing the peace and other charges stemming from the march and what followed.

U.S. agents fired tear gas into Mexico Sunday to stop some migrants who tried to breach the border.

More than 5,000 Central American migrants have been camped out for more than a week at a sports complex in Tijuana awaiting an opportunity to seek asylum in the United States.