An FIR has been registered against Uttar Pradesh's Kunda MLA Raghuraj Pratap Singh, alias Raja Bhaiya, at Delhi's Safdarjung Enclave police station following a complaint by his wife Bhanvi Singh, an official said. In her complaint, Bhanvi accused Raghuraj of years of physical and mental abuse, police stated. The couple has been living separately for several years, it added.