While police denied any such incident, mediamen deployed outside Bachchan's bungalow anticipating trouble in the wake of clashes between the MNS and Samajwadi Party (SP) supporters yesterday said they heard verbal abuses being hurled by the duo and also saw a bottle being thrown by them.
Security was already stepped up at Bachchan's house 'Prateeksha' in Juhu following the MNS chief Raj Thackeray's attack on the superstar for preferring Uttar Pradesh over Maharashtra for opening a girls' college.
Police stations across Mumbai are on alert and police patrolling has been stepped up to prevent possible attacks on taxi drivers and other migrant workers from North India.
The attack came hours after supporters of Maharashtra Navnirman Sena leader Raj Thackeray attacked taxi drivers and others from Uttar Pradesh and Bihar in Mumbai's Dadar area.
Navnirman Sena workers also clashed with Samajwadi Party workers at an SP rally on Sunday.
Over the last few days, Thackeray had made public statements questioning Bachchan's loyalty to the state. The Bachchans don't live in 'Prateeksha' but in another house called 'Jalsa'. Bachchan family is originally from Uttar Pradesh while Jaya Bachchan is a Samajwadi party MP.