An FIR has been registered against RJD supremo Lalu Prasad Yadav's brother-in-law Subhash Yadav and six others for alleged land grabbing and extortion in Bihar, officials said. Subhash is a former Rajya Sabha MP. Earlier, an FIR was lodged against him for allegedly manhandling a woman when she tried to stop his men from constructing a structure on her land.