Former Senator Antonio Trillanes IV announced that his mother Estelita Fuentes Trillanes died of complications due to Parkinson's disease on August 6, which also happens to be his 50th birthday.
Trillanes made the announcement on his Facebook page Friday noon, August 6.
"It is with deep sadness that I announce the passing of our beloved mother, Mrs. Estelita Fuentes Trillanes," he wrote.
"She died of complications due to her advanced Parkinson's condition. She was 87," he added.
The Mayo Clinic website described Parkinson's disease as a progressive nervous system disorder that affects movement.
Symptoms start gradually, sometimes starting with a barely noticeable tremor in just one hand. Tremors are said to be common, but the disorder commonly causes stiffness or slowing of movement.
To date, there is no known cure for Parkinson's disease.