Over 20000 nurses in government hospitals in Delhi on Friday went on an indefinite agitation to press for higher salary and allowances even as the government decided to crack down on the agitation by invoking the Essential Services Maintenance Act (ESMA) against them. Around 80 nurses of Ram Manohar Lohia Hospital were detained by Delhi Police for going ahead with the strike. The agitation has badly hit over 40 central and state government hospitals in Delhi at a time when dengue and chikungunya cases are soaring. Delhi Lt Governor Najeeb Jung invoked the ESMA against the striking nurses terming the