The vigilance department in Uttar Pradesh has served notices to former Bahujan Samaj Party ministers, Naseemuddin Siddiqui and Babu Singh Kushwaha, in connection with the Rs 4,200-crore scam, involving construction of memorials in Lucknow and Noida under the Mayawati government.
Naseemuddin Siddiqui is now in the Congress while Babu Singh Kushwaha heads the Jan Adhikar Manch party.
So far, 20 people have been arrested in connection with the scam which has been probed since 2013.
The inquiry was initiated after a Lokayukta probe indicted 199 persons, including Siddiqui, Kushwaha and 12 BSP MLAs.
A source in the vigilance department said that notices have also been served on 40 government officers who were in service at that time for recording their statements.
Vigilance officials said that project managers had used red sandstones which…