Both nations accused the other of firing first in their deadliest fighting in more than a decade. Thai authorities said the clashes had killed 11 civilians and a soldier.
Many of the blasts, some of them deadly, have been at weapons storage sites, raising questions about whether ordnance from Syria’s civil war has been properly secured.
The Trump administration said it was protecting Americans unjustly held abroad. One of the rescued men, Dahud Hanid Ortiz, killed three people, according to court documents.
The deals highlight the countries’ deepening relationship under the new Syrian government, and a wave of investment in a country squeezed by war and sanctions.