After an altercation with an auto driver and two bikers, and assaulting a cop from Vakola police station in an inebriated state, a brother-sister duo, who hail from Manipur, were arrested last Friday.

While the bikers had already fled the spot by the time the copsarrived, the duo alleged that one of the bikers had molested the28-year-old woman. Both were produced in the court and remanded to judicial custody. A molestation case will be filed this week.