A spokeswoman for former Israeli President Shimon Peres said Sunday that the 92-year-old statesman was rushed to a hospital after experiencing chest pains.
Ayelet Frisch said medics treated Peres at his home Sunday night and detected a "light irregular heart rate." She said doctors decided that he should spend the night in the hospital for observation.
Peres was discharged from a hospital last week after suffering a mild heart attack.
Peres completed his seven-year term as president in 2014. He remains active in Israeli politics through his nongovernmental Peres Center for Peace, which promotes coexistence between Arabs and Jews.
In a seven-decade political career, Peres served three stints as prime minister.
He won the Nobel Peace Prize in 1994 following the signing of the Oslo peace accords with the Palestinians.