"The BJP should answer... He is visiting a BJP-ruled state (of Madhya Pradesh)," he told reporters here.
The Sri Lankan president is scheduled to visit Sanchi in Madhya Pradesh for a Buddhist function on September 21. Pro-Tamil leaders, including MDMK founder Vaiko had alleged the Lankan leader was invited by BJP's Sushma Swaraj, which has been denied by the party.
Opposing training of Sri Lankan military personnel in India, Vasan, however, criticised the recent attacks on pilgrims of that country who were on a tour of Tamil Nadu to visit a holy shrine, besides the state government ordering the return of Sri Lankan football players.
He slammed the opposition BJP for stalling Parliament proceedings during the just concluded monsoon session and said though government was prepared to discuss issues the Opposition did not allow it.