PATNA, June 2 -- Unidentified armed criminals robbed cash and valuables worth Rs.20 lakh from the house of a retired government employee at Ghurdaud Road under Rajivnagar police station in the wee hours of Sunday. No arrests have been made so far. Police said a gang of six armed robbers stormed the residence of the retired irrigation department accountant after they held the elderly couple hostage and fled with cash and jewellery worth Rs.20 lakh. The incident occurred between 2am and 3am at Abhyudaya Nagar....