A group of five to six persons today vandalized an office of ABVP, the student union affiliated to BJP, police said.
The attackers damaged furniture in the office, located in the Marble Arc building near the Matunga railway station in central Mumbai.
No arrests have been made so far, police said.
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Vemula and four others had faced action from Hyderabad Central University authorities for allegedly assaulting an ABVP leader last August.
Yadunath Deshpande of ABVP here alleged that members of a youth organisation loyal to Congress vice President Rahul Gandhi were behind the attack.