A Texas Amber Alert has been issued for 6-year-old Lucas Mendez and 2-year-old Lukane Mendez from Gonzales County, local officials say. Anyone with information is urged to call 911 immediately. The children were last seen in Rosanky, a small community in Bastrop County, at 8 p.m. Friday, according to the amber alert. Details about the circumstances of their disappearance were not immediately released. The children are believed to be with Martin Mendez, who is described as a 34-year-old Hispanic male with black hair and brown eyes, standing 5 feet 7 inches tall and weighing 170 pounds. No vehic…