UN Secretary-General Antonio Guterres condemned Tuesday a strike on an Iranian consular annex building in Syria one day earlier, his spokesman said.

Israeli is responsible for the attack, which led to the martyrdom of seven Iranian military advisors in Syria.

"The Secretary-General reaffirms that the principle of the inviolability of diplomatic and consular premises and personnel must be respected in all cases in accordance with international law," spokesman Stephane Dujarric said, AFP reported.

The Leader of the Islamic Revolution Ayatollah Ali Khamenei issued a statement on Tuesday saying Israel will “repent” its criminal act.