The Central Bureau of Investigation's decision to freeze bank accounts linked to the son of late Andhra Pradesh leader YS Rajasekhara Reddy has the potential to backfire on the ruling Congress in the state, observers said. With byelections in 18 assembly constituencies due next month, the CBI's move will hardly leave Jagan Mohan Reddy cash-starved. But it may stoke sympathy for Reddy, who broke away from the Congress to form his own party which he claims is the inheritor of Rajasekhara Reddy's legacy.