The Chinese ambassador to Israel was found dead at his home in the outskirts of Tel Aviv.
Du Wei, the 57-year-old envoy, who had arrived in Israel in mid-February, was found dead at his home in Herzliya, north of the city, spokesman Micky Rosenfeld told AFP, adding that police were investigating.
Du's wife and son were not with him in Israel. The Chinese foreign ministry said it would only comment when it had "solid" information.
Israeli police and forensics teams could be seen at the residence, a property guarded by a low wall and shaded by a leafy garden, AFP reporters said.
The Haaretz daily said initial reports said staff had found Du dead in his bed and that there were no signs of violence.
It quoted Israel's emergency medical service Magen David Adom as saying the cause of death appeared to be a cardiac incident.