Chandigarh : Rakha Singh Lakha the private assistant of Dr. Asish Kumar posted at Civil Hospital Mansa was arrested by the Punjab Vigilance Bureau for demanding a bribe of Rs 3, 500 from the complainant Hardeep Singh for conducting surgery of his wife. On the basis of this enquiry the police has arrested the accused Rakha Singh Lakha and registered a bribery case against him under the Prevention of Corruption Act at VB Police Station, Bathinda range and the role of concerned doctor is being investigated said the police.