Uttar Pradesh, Mar 11 (ANI): The Lok Sabha by-elections for two constituencies of Uttar Pradesh, namely Gorakhpur and Phulpur are underway. The bypoll was necessitated after Uttar Pradesh Chief Minister Yogi Adityanath and Deputy Chief Minister Keshav Prasad Maurya vacated their seats in Gorakhpur and Phulpur, respectively, on taking office. For Gorakhpur, the key contenders are Upendra Shukla from Bharatiya Janata Party (BJP), Praveen Nishad from Samajwadi Party (SP) and Surhita Chatterjee Karim from Congress. Meanwhile, candidates in the fray for the Phulpur seat are Kaushalendra Singh Patel from the BJP, Nagendra Pratap Singh Patel from SP and Manish Mishra from Congress. For these bypolls, the Bahujan Samaj Party (BSP) and the SP have set aside their rivalry to join forces. Tight security arrangements have been made to ensure security during polls.