Hundreds of Iranian civilians including over 200 kids were killed in US-Israeli attacks, Araghchi wrote on his X account.
He added that based on reports some neighboring countries which are hosting the US military have let them use their soli to attack Iran and played active role in provoking these massacres.
These countries, he noted, are expected to adopt transparent position in this regard.
Earlier speaking with his French counterpart Emmanuel Macron over the phone, President Masoud Pezeshkian criticized regional countries for allowing the United States to use their soil to attack Iran, saying that the move is in violation of international law and good neighborliness.
He also said that the main source of insecurity and instability in the region is the aggressive behavior of Israel and the US, citing as examples the ongoing war with Iran and the previous 12-day conflict with the country last June, as well as attacks in Lebanon and Gaza.
IRNA