Coming close on the heals of an embarrassing pasting at the hands of former Sena strongman Narayan Rane in the Malwan by-polls, the Sena suffered another setback on Sunday as party executive president Raj Thackeray quit the post.
Raj's move is seen as the result of a fallout with cousin Udhav.
Earlier, Raj had sent a letter to Sena chief Bal Thackeray expressing unhappiness at Uddhav's 'style of functioning'.
A large number of workers of Bharatiya Vidyarthi Sena -- Shiv Sena's student wing which mostly has Raj's supporters -- gathered at his Dadar residence on Sunday to express solidarity.
Photgraph: Arun Patil