The cause of death is unclear. Turner took office weeks ago, filling the seat left vacant by the death of Rep. Sheila Jackson Lee.

Turner's unexpected passing comes months after the 70-year-old was elected to replace Rep. Sheila Jackson Lee, who also died in office in July.

Turner’s death comes two months into his first term representing Texas’ 18th Congressional District, the seat long occupied by former U.S. Rep. Sheila Jackson Lee, who also died in office last year amid a battle with pancreatic cancer.