WASHINGTON (Reuters) – The Biden administration has secured agreements for Mexico, Honduras, Guatemala to place more troops on their borders, a White House official told Reuters on Monday amid the growing number of migrants arriving at the U.S.-Mexican border.

The official did not provide any details. Earlier, White House aide Tyler Moran told MSNBC that the Biden administration had secured agreements with Mexico, Honduras and Guatemala to put more troops on their own border.

Reuters was not immediately able to establish what agreements the officials were referring to or whether they go beyond existing enforcement measures in those countries.

The Mexican, Honduran and Guatemalan governments did not respond immediately to requests for comment about any new measures.

Reuters reported in March that Mexico had stepped up raids aimed at rounding up immigrants transiting illegally north toward the U.S. border, and reinforced its efforts along its border with Guatemala.

Those efforts have not yet produced significant results, and have been complicated by pandemic restrictions and new rules limiting the capacity of Mexican immigration detention centers.

In January, just before Biden took office, Guatemala deployed security forces to halt a U.S.-bound caravan of migrants, and Guatemalan government officials have vowed to keep up the pressure.

(Reporting by Steve Holland; Additional reporting by Laura Gottesdiener in Mexico City, Gustavo Palencia in Tegucigalpa and Sofia Menchu in Guatemala City; writing by Susan Heavey; Editing by Tim Ahmann)