MEXICO CITY - Secretary of State Mike Pompeo on Sunday thanked his Mexican counterpart for increased immigration enforcement by the country, which he said is leading to fewer migrants entering the United States.

Pompeo later traveled to El Salvador to meet with President Nayib Bukele, with the two sides pledging to work together on the issue of immigration.

The top US diplomat's meeting in Mexico confirmed that relations between Washington and Mexico City had calmed considerably since early June, when President Donald Trump had threatened stiff new trade tariffs against the United States' southern neighbor unless it acted forcefully to slow the migrant flow.

Pompeo met Sunday in Mexico City with Foreign Minister Marcelo Ebrard on a regional trip that began in Argentina and Ecuador.

"Secretary Pompeo thanked Foreign Minister Ebrard for Mexico's increased immigration enforcement efforts," the State Department said.

Speaking in El Salvador, Pompeo said that Mexico has "made real progress" on migration.

"The numbers are good... There are fewer apprehensions taking place today along our southern border, but we've got a long way to go yet -- there's still much more work to do," he told a news conference in San Salvador.

The meeting between Ebrard and Pompeo, while focused primarily on migration, also included talks on recovering the wealth of notorious drug trafficker Joaquin "El Chapo" Guzman -- sentenced to life imprisonment in the US -- as well as the status of the not-yet-ratified North American trade agreement, the Mexican Foreign Ministry said.

The Mexican statement said Pompeo had recognized "significant advances" by Mexico on slowing migration since a high-stakes June 7 meeting in Washington held amid a growing migration crisis.

That accord -- reached under the shadow of Trump's trade threats -- stipulated that failure by Mexico to rein in cross-border migration within 45 days could result in the need to negotiate a tougher arrangement. -AFP