The intensity of the blast was so high that window panes in adjoining buildings were shattered and shocked people were seen running helter-skelter, an eyewitness said.
As many as 47 injured people (of the total 201) were undergoing treatment at various hospitals. Rest were discharged.
The death toll in the massive explosion at an industrial unit in Dombivali township of the district has risen to six while 159 injured were undergoing treatment, a senior official said on Friday.