Kathmandu, June 19 Four women have been attacked by sharp objects within one-and-a-half months in the capital. Of the four victims, three are receiving treatment at Sukraraj Tropical and Infectious Disease Hospital. The women have puncture marks above right knee. These marks are left by a sharp needle like object. It could be from a metallic syringe or a needle or a pointed nail, said Anup Bastola, consultant tropical medicine physician at STIDH, who is involved in the treatment of the victims. “It is reported that women have been attacked by a biker with a needle like object. Three women have filed complaints with the police after being pricked by a needle-like object. We are investigating the case. A team has been formed to probe into the incident after three women from Dallu and Paknajol registered complaints,” said Spokesperson for the Metropolitan Crime Range DSP Hobindra Bogati. If someone is pierced deep by a metallic syringe, it can increase the risk of transmitting HIV, Hepatitis B and C. To prevent people from possible transmission of HIV and Hepatitis B they are given post-exposure prophylaxis. These antiretroviral drugs help to prevent HIV if someone is exposed to the infection. There is 0.03 per cent risk to contact HIV if someone is pierced by a metallic syringe. But to ensure whether the women contacted HIV or not, it takes three to six months time, said the doctor.