Mexico's interior minister outlined plans to strengthen her own country's porous southern border, where hundreds of illegal crossing points have been identified.

Speaking at a gathering of Mexican diplomats at the foreign ministry, Olga Sánchez Cordero said at least 10,000 migrants had entered Mexico from Honduras, El Salvador and Guatemala since last October, and that another U.S.-bound "caravan" from the south was expected to arrive in mid-January.

Sánchez Cordero said the government was determined to ensure that "legal and orderly" entry takes place.

As part of the new government's migration policy, she said, anyone wanting to enter Mexico would have to provide information including reason for entry, biometric data, and an identity document.

"Those who refuse to provide identity or biometric data will not be able to enter Mexican territory."