The CBI has summoned Samajwadi Party president and former Uttar Pradesh chief minister Akhilesh Yadav as a witness for questioning on Thursday in illegal mining cases, five years after registering the case.

In a notice issued under section 160 of CrPC, the agency asked him to appear before it on February 29 in connection with the case registered in 2019, officials said.

The section allows a police officer to summon witnesses in a probe.

The case pertains to the issuance of mining leases in alleged violation of e-tendering process. The Allahabad High Court had ordered the probe.

It is alleged that public servants allowed illegal mining during 2012-16, when Yadav was chief minister, and illegally renewed licences despite a ban by the National Green Tribunal on mining.

It is alleged that the officers allowed theft of minerals, extorted money from lease-holders and drivers.

The CBI had filed seven preliminary enquiries in 2016 on the directions of the Allahabad High Court to probe the case of illegal mining of minor minerals.

The agency had alleged that the then chief minister Akhilesh Yadav's office had cleared 13 projects in a single day, officials said.

They had said Yadav, who also held the mining portfolio for sometime, had cleared 14 leases, of which 13 were cleared on February 17, 2013, in violation of e-tendering process.

The Central Bureau of Investigation (CBI) claimed that on February 17, 2013, the leases were granted by the district magistrate of Hamirpur, B Chandrakala, after getting approval from the chief minister's office in violation of its 2012 e-tender policy, which was ratified by the Allahabad High Court on January 29 that year.

The CBI had carried out searches at 14 locations in January 2019 in connection with its FIR against 11 people, including IAS officer B Chandrakala, Samajwadi Party MLC Ramesh Kumar Mishra and Sanjay Dixit (who unsuccessfully contested the 2017 assembly election on a BSP ticket) to probe the alleged illegal mining of minor minerals in Hamirpur district during 2012-16.

Yadav, who was the chief minister of the state between 2012 and 2017, held the mining portfolio during 2012-13 apparently bringing his role under scanner, according to the FIR.

He was succeeded by Gayatri Prajapati, who took charge as mining minister in 2013 and was arrested in 2017 following a complaint of rape by a woman residing in Chitrakoot.