Hezbollah leader Hassan Nasrallah is reportedly taking shelter amid fears that he may be next on a US-Israel hit list, according to an Israeli TV reports.
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Nasrallah is reportedly "canceling any movements" following the assassination of Iran's chief nuclear scientist Mohsen Fakhrizadeh on Friday, Channel 13 News reported.
Tehran has accused Israel and the US of being behind Fakhrizadeh's killing.
Israel put its embassies around the world on high alert on after Iranian threats of retaliation.
Iran's President Hassan Rouhani has stressed the country will seek its revenge in "due time" and not be rushed into a "trap."