Texas Border Patrol agents stationed in the Rio Grande Valley Sector have encountered more than 800 illegal immigrants within a 24-hour period, including what officials described as the largest group apprehended thus far, this year. The two large groups were encountered by border agents on Tuesday and the first batch of aliens attempting to illegally enter the United States was taken into custody in the morning. “At the time, [this] was the largest group encountered this summer,” U.S. Customs and Border Protection (CBP) said in a press release. “Many within the group suffered from dehydration and exhaustion,” they added. The group consisted of 336 immigrants of which 328 were family members. The remaining eight were unaccompanied children. The majority were coming from Guatemala. “Border Patrol Emergency Medical Technicians responded and provided medical assistance to those in need before being sent to the hospital for further treatment,” officials said. Later that day, border …