A 15-year-old in France was arrested on suspicion of threatening Israeli President Isaac Herzog, Israeli media reported on Sunday.
Also, the same day, French police opened an investigation into death threats against three Israeli athletes at the Paris Olympic Games, the Paris' prosecutors office said.
Anti-cybercrime officers are also investigating the release of athletes' personal data on social networks on Friday and seeking to have it removed, prosecutors said.
Iranian plot to target Israeli athletes and tourists?
Israel's foreign minister warned his French counterpart on Thursday of a potential Iranian-backed plot to target Israeli athletes and tourists during the Paris Olympic Games.
Israeli athletes in the Games are being escorted to and from events by elite tactical units and given 24-hour protection throughout the Olympics, officials say. Israel's internal security service, Shin Bet, is helping with security.
This is a developing story.