ROHTAK: The police have arrested seven people in connection with the rape and murder of a 28-year-old mentally-challenged woman from Nepal on the Rohtak-Hisar highway.

The deceased had been residing with her sister for the past three months and was undergoing treatment at the Post Graduate Institute of Medical Sciences (PGIMS) here, they said.

The victim's sister had lodged a complaint with police on February 1 and on February 4, the woman's body was recovered from the fields in Akbarpur village with several injury marks on it, Rohtak Superintendent of Police (SP) Shashank Anand said.

Meanwhile, Haryana police has announced a cash reward of Rs 1 lakh for information leading to the arrest of accused, officials said.

A Special Investigation Team (SIT) has been constituted to crack the case, the SP said.

The post-mortem report of the woman mentioned several injuries on her private parts, doctors of PGIMS said, adding that stones and blades were also found in her body.

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Former chief minister Bhupinder Singh Hooda today condemned the incident and accused the state government of lawlessness in Haryana.

Police is working on different theories to get leads in the rape-cum-murder case, Anand said.