JMM candidate Seema Mahto is leading over his AJSU president Sudesh Mahto by 3900 votes in Silli Assembly seat after fifth round of counting.
The by-poll in both Gomia and Silli Assembly seats were necessitated following conviction of Yogendra Mahto (Gomia) and Amit Mahto (Silli) who won on JMM tickets in the last Assembly elections.
The counting of votes for by-elections to four Lok Sabha seats and 10 assembly constituencies began on Thursday morning.
The Lok Sabha seats which went for polls were: Palghar and Bhandara-Gondiya in Maharashtra; the politically-crucial Kairana Lok Sabha constituency in Uttar Pradesh, and Nagaland parliamentary constituency.
The by-elections were held in Legislative Assemblies of Shahkot (Punjab), Tharali (Uttarakhand), Ampati (Meghalaya), Chengannur (Kerala), Jokihat (Bihar), Gomia (Jharkhand), Silli (Jharkhand), Maheshtala (West Bengal), Noorpur (Uttar Pradesh), Palus Kadegaon (Maharashtra).
The elections to these seats were held on May 28.