A woman cadre carrying a reward of Rs 4 lakh on her head, surrendered before the Visakhapatnam rural police on Thursday along with two associates citing "frustration" with the naxal movement and harassment by some top cadres.

According to police, the woman ultra, identified as Korra Gasi (27) alias Jhansi, was involved in the abduction of then Malkangiri district Collector Vineel Krishna in 2011, and in a string of cases including firing on the police.

"The Maoist militia members namely Buturi Appa Rao (45) and Velusuri Lakshmaiah (30) cited ill-health and their frustration with top leadership of the movement as the primary reasons for their surrender," said Superintendent of Police (Visakha Rural) Dr Koya Praveen.

Gasi, operational in Koyyuru under Vizag Agency area, has been associated with the banned CPI (Maoists) since 2007 and was involved in as many as 24 offences in Vizag district.

"Apart from having worked as the ACM (Are Committee Member) of East Visakha Joint Division, Gasi had also worked on Andhra-Odisha border. She used to double up as a small-time doctor for her outfit," the SP said.

Addressing reporters, Gasi cited her frustration with the Naxal movement and ill-health as the reasons behind her surrender.

She claimed that some cadres were being denied medical attention due to the policies of the top Maoists and that many ultras will turn themselves in before police in coming days.