"The referendum in Kurdistan was against the Iraqi constitution, which does not help the people of Kurdistan, and is not justifiable for Iraq's security", Mohammad Javad Zarif said.
According to results announced by the KRG, nearly 93 percent of registered voters cast ballots in favor of independence.
The Turkish president stated: "In our view, the decision taken by negotiating the Mossad is in no way legitimate and acceptable", adding that Turkey considers the Kurdish referendum as illegitimate.
Erdogan is set to meet his counterpart, Hassan Rowhani, and Iranian supreme leader Ayatollah Ali Khamenei during his visit.
"Paying no attention to the time and security requirements and pursuing tribal goals through this move will reduce the focus on the fight against Takfiri terrorism ... and will rapidly spread the harmful security impacts on the Kurdish region of Iraq", he said.
Tanjug is reporting this, citing Reuters, and adding that Erdogan said his country had already taken "some measures in coordination with the Iraqi central government (and Iran)".
The Turkish top commander, for his part, stressed the need to support the central government in Iraq and preserve the integrity of the Arab country.
Iran and Turkey will work together to confront the disintegration of Iraq and Syria to ease tension in the crisis-hit region, Rouhani said after meeting with Erdoğan in Tehran. The drills involved armor and artillery units as well as other air units. In meeting, Chief of Staff General Hulusi Akar, who previously came to Iran to make contacts, was also present.
In the wake of Iraqi Kurdistan's independence vote, Iraq, Iran and Turkey are taking steps to ensure that borders in the region remain unchanged.
Iran and Turkey have been rivals for centuries but have recently sought to forge a pragmatic relationship, with the Islamic Republic strongly supporting Erdogan after last year's failed coup.