Opposition leader Isaac Herzog was hospitalized on Friday night in Tel Aviv.
Hosptial officials at the Sourasky Medical Center said that tests suggested the Labor Party underwent a "minor, fleeting stroke," and that he is "feeling well and is communicating with his surroundings."
He is to remain at the neurological department for observation, the hospital said.
Herzog tweeted from the hospital: “Tonight I felt unwell. I arrived with Michal to the Tel Aviv Medical Center just in case. Undergoing tests and felling much better. Thanks to the concerned and to the medical staff. Shabbat Shalom.”