Leaders of the Palestinian Islamist movement, Hamas, say they will not help Iran militarily in any conflict between Israel and the Islamic Republic.But Iran's FARS quotes Zahar as saying the opposite:
There is speculation in Israel that if it attacked Iran's nuclear facilities, it could face rocket fire from Hamas in Gaza and Hezbollah in Lebanon.
Both are long-time allies of Iran.
"If Israel attacks us we will respond. If they don't, we will not get involved in any other regional conflict," he added.
Mr Zahhar questioned Hamas's ability to offer support from the Palestinian territory to the south of Israel, even if it wanted to.
"Don't exaggerate our power. We are still suffering from the occupation, the siege and two wars in recent years," he said.
Mahmoud al-Zahar, a senior official of the Palestinian Hamas movement, strongly rejected a recent BBC report which quoted him as saying that Hamas would take no action in case of an Israeli invasion of Iran, and warned that any Israel or US attack on Iran will be reciprocated by Hamas's crushing response to the Zionists.Who is more likely to be lying: The BBC, Mahmoud Zahar or Iran's FARS news agency?
BBC Persian's website alleged in a report on Wednesday that the No. 2 Hamas official in the Gaza Strip has assured that his movement would not take any action in the face of an Israeli attack on Iran.
Al-Zahar strongly rejected the BBC claim as unfounded and a lie.
"Retaliation with utmost power is the position of Hamas with regard to a Zionist war on Iran," Zahar told FNA on Wednesday afternoon.
Zahar rejected the possibility of any Israeli aggression against Iran, but meantime, reiterated that Hamas will give a crushing response to not only the Zionists but also to "whoever helping them" in such an attack.
That's a tough one.