The four persons were picked up by the Mizoram Police last night as they were suspected to be the masked men who robbed a woman of more than Rs three lakh and four cell phones on January 20 last at her residence in Saron Veng locality, Aizawl, Superintendent of Police Lalbiakthanga Khiangte said.
The victim said the robbers threatened her with pistols and knives and decamped with her savings after warning her not to inform the police and the media.
The police have recovered Rs 26,530 and a mobile phone from the arrested persons.