coimbatore the city police on thursday arrested a 55yearold resident of the slum clearance boards ammankulam housing unit for killing his wifem thangaraj a construction worker had set his wife kamala 50 on fire on wednesday following a domestic dispute police sources said the woman was battling for life at the coimbatore medical college and hospital cmch and died without responding to treatment on thursdaythangaraj had doused kerosene on kamala and set her ablaze following an argument over his extramarital relationship around 930pm on wednesday she suffered 50 burnsbased on kamalas complaint ramanathapuram police inspector murugesan registered a case against thangaraj under section 307 attempt to murder 294 b sings recites or utters any obscene song ballad or words in or near any public place 323 punishment for voluntarily causing hurt and 324 voluntarily causing hurt by dangerous weapons or means of the indian penal code and arrested him on thursday he was lodged in the pollachi subjail after kamala died the fir was altered to include murder chargekamalas body was handed over to the family on friday