`As Turkey rises as a key actor in the region, Iran tries to show that it is not lagging behind its neighbor, suggesting the establishment of a four-way partnership to deal with regional issues. Turkey recently proposed a three-way strategic cooperation with Iraq and Syria in the wake of a diplomatic crisis between those two countries
Concerned about Turkey’s growing influence in the region, Iran is preparing to offer its neighbor a spot in a four-way partnership with Iraq and Syria to deal with the countries’ common problems.`
For more information about this issue, read the full article : Iran urges Turkey to set up four-way mechanism - Hurriyet Daily News and Economic Review