( CNN ) -- A father and son in south Texas were charged Thursday with shooting an agent with U.S. Immigration and Customs Enforcement , federal authorities said . Pedro Alvarado , 41 , and Arnoldo Alvarado , 18 , are accused of assault on a federal officer and using a firearm during a crime of violence . ICE agent Kelton Harrison was shot Tuesday morning near Hargill , Texas , while he and other agents were conducting surveillance relating to an anticipated narcotics deal . According to a criminal complaint , Harrison was in a parked car when gunshots allegedly were fired from an approaching vehicle . Harrison started driving away and the other car followed and the occupants continued firing at Harrison 's vehicle . The court document said Harrison finally lost control of his car and when other agents arrived on the scene they discovered he 'd been shot in back . Harrison survived the shooting but underwent an operation and is still hospitalized . A search was conducted of a home in Hargill where the two Alvarados were found along with an unidentified minor . According to the court document , the younger Alvarado admitted that he and the minor fired shots at the agent 's car while his father drove their vehicle . Pedro and Arnold Alvarado were arrested and had a court hearing before a magistrate judge Thursday and will remain in jail pending a detention hearing next week . The men requested the judge appoint counsel to represent them . A Justice Department press release said the minor involved in the case was turned over to state authorities . `` We are encouraged by this action to bring these criminals to justice , '' said ICE Director John Morton . `` We continue to keep the agent and his family in our prayers during his road to recovery . ''
ICE agent Kelton Harrison was shot Tuesday morning near Hargill , Texas . He and other agents were conducting surveillance relating to an anticipated narcotics deal . A 41-year-old man and his 18-year-old son were arrested and charged in the shooting . The father has been identified as a member of the Mexican Mafia gang La Familia.