The women were apprehended while they were trying to enter India from Bangladesh at around 3:30 pm last evening, they said.
According to the BSF, 52-year-old Lily Leima Devi, a resident of Manipur's Imphal West was the publicity secretary of the Revolutionary People's Front/PLA.
The other two women, 52-year-old Memma Devi was a PLA cadre and Laiman 34-year-old Chandra Rani a KYKL cadre with both from Komgkham village in Bishnupur district.
Chandra Rani reportedly told the BSF that her husband, Shoba Singh, was a top cadre of the KYKL.
Rs 2,49,400 in cash, gold items, mobile phone and personal luggage were seized.
The two others were minors identified as Ibngo and Shamila.
They were later handed over to Meghalaya police for interrogation.