Police have arrested three men and a woman after seizing drugs worth over Rs 19 lakh from their possession in two separate cases in Maharashtra's Thane district, officials said.

Acting on a tip-off, the police raided the house of one Kamal Ansari in Bhiwandi town on Friday and seized 75 kg of ganja concealed there, senior police inspector, crime unit II, Bhiwandi, Sachin Gaikwad said. The contraband was worth Rs 14.92 lakh, he said, adding that the police also seized Rs 1.37 lakh in cash and a couple of mobile phones. Ansari was arrested and a case was registered against him under provisions of the Narcotic Drugs and Psychotropic Substances (NDPS) Act, the official said.