Gadchiroli/ Khunti, April 12 (ANI): As India entered the fourth phase of general elections, threat of Maoists loomed large as the rebels carried out attacks in different places. In Gadchiroli district of Maharashtra, a police official was killed and five others were injured in an ambush while the police team was returning after casting their votes. Similarly, Maoists carried out an attack in Khunti district of Jharkhand where AAP candidate Dayamani Barla, was attacked by members of rebel outfit People's Liberation Front of India (PLFI), who also threatened to kill Barla and other party members if they continued with their election campaigning.