The Central Bureau of Investigation has taken over the probe into an alleged Rs 126 crore scam in buying land in Mathura for the Yamuna Expressway project, which connects Noida with Agra. Former Uttar Pradesh chief minister and Bahujan Samaj Party chief Mayawati had started the 165-km expressway project in 2009, and her rival Akhilesh Yadav of the Samajwadi Party, who became chief minister after her, had inaugurated it in 2012.