TEHRAN - An Iranian source has told Al Jazeera that Tehran has sent a message to the United States via Qatar addressing the rising regional tensions.

In the message, Tehran told Washington that “the phase of unilateral self-restraint has ended.”

It also said any Israeli attack would meet an “unconventional response” that includes targeting Israeli infrastructure.

The indirect message also emphasized that Iran does not want a regional war, the official said.

In a meeting on Wednesday with a high-ranking delegation from the Palestinian Hamas resistance movement in Dohan, Iranian President Masoud Pezeshkian reiterated Tehran’s position that the Islamic Republic will definitely give a “stronger and more crushing” response to Israel if it commits the “slightest” mistake.

The meeting came a day after the Islamic Republic carried out a retaliatory operation against Israel, dubbed Operation True Promise II.

Pezeshkian criticized Western countries for making empty promises, saying they requested Iran to exercise self-restraint and refrain from giving a response to the Israeli assassination of Ismail Haniyeh, the Hamas political bureau chief, in Tehran on July 31 in exchange for establishing ceasefire in Gaza.

Therefore, "the continuation of the Zionist regime’s crimes made the Armed Forces of the Islamic Republic of Iran to give a decisive response,” he added, Press TV reported.

The president condemned the atrocities perpetrated by Israel in Gaza and Lebanon, and lashed out at the United States and other Western countries for pursuing hypocritical approaches, saying they back Israel while claiming to advocate democracy and human rights.