A 4-year-old boy was lifted over U.S.-Mexico border fence from the Mexico side after he was critically injured after being hit by a car.

On Monday, the boy and his 18-year-old cousin, both American citizens, were lifted over a fence near Jacume, Mexico after the younger boy was injured while visiting family in Mexico.

The older cousin was lifted over to assume responsibility for the boy.

An international Border Patrol liaison unit in Mexico reportedly called agents on the U.S. side to ask for help in getting the boy over the fence and to a hospital. At around 8:30 p.m., agents on both sides worked to get him over the fence. A spokesman for the agency says the agents then performed life-saving measures for about 40 minutes until paramedics arrived.

The 4-year-old’s father said he wants the agents who helped his family to know he is “extremely appreciative” and says he is “thankful for … the Border Patrol as a whole.”

The boy was airlifted to a hospital and on Wednesday was listed in stable condition.