A Competition Commission probe has found that food delivery platforms Zomato and Swiggy indulged in unfair business practices, including alleged preferential treatment to some restaurant partners, according to sources.The detailed investigation was ordered by the Competition Commission of India (CCI) in April 2022 and the probe report was submitted to the regulator earlier this year.Under the norms, CCI director general's report has been shared with the parties concerned and later, they will be called for hearings by the watchdog.