A leader of Telugu Desam Party (TDP), S Bhaskar Reddy, was killed on Thursday during clashes at Tadipatri town.
TDP leaders have accused the YSR Congress Party (YSRCP) workers of killing Reddy.
Tadipatri is a stronghold of controversial TDP leader J C Diwakar Reddy whose son Pawan Kumar is contesting on the TDP ticket this time.
In another incident, Kodela Siva Prasad was attacked at a polling station. TDP has alleged that the YSRCP is indulging in violent acts.
Polling is underway for 25 Lok Sabha and 175 Assembly seats in Andhra Pradesh.
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