Abraham Isaac Quintanilla Jr., the father of music icon Selena, has passed away. He was 86 years old. His son, A.B. Quintanilla III, announced the sad news on Instagram Saturday morning. Sharing a picture of his dad, he wrote in the caption: "It's with a heavy heart to let you guys know that my Dad passed away today." Related: HGTV Star Frank Cozzolino Dead At 56 - Holmes On Homes Co-Star Reacts A.B. did not share more details about Abraham's passing. The cause of death is also unknown at this time. See the post (below): View this post on Instagram A post shared by A.B.