In all likelihood, the Election Commission may hold other by-elections with these four, said the sources.

In the last fortnight, the two officers have visited Firozabad, Varanasi, Jaunpur, Jhansi, Etawah, and Deoria districts. On Monday, they were in Auraiya district in which Bidhuna Assembly seat has fallen vacant after the resignation of MLA Dhani Ram Verma, whose son Mahesh had contested against Akhilesh Yadav in Kannauj Lok Sabha seat.

The officers began their exercise from eastern UP’s Varanasi district.

The Kolasala Assembly seat in Varanasi district fell vacant due to BJP MLA Ajay Rai’s decision to contest the Lok Sabha polls as SP nominee from the Varanasi parliamentary seat.

The BSP had fielded don-turned-politician Mukhtar Ansari for the Varanasi Lok Sabha seat where BJP’s Murli Manohar Joshi won.

During the campaign, Mayawati had called Ansari “gareebon ka masiha”.