He lauded the people of the city for refusing to be provoked by the "nefarious" act.
Singh visited the twin blast sites and Omni and Yashoda Hospitals where he met some of the injured and their families, assuring them of all help.
"I have come to share the grief of people of Hyderabad. I express condolence for the families of the bereaved and wish speedy recovery for the injured," Singh said after meeting the blast victims at the hospitals.
He also said the state government has assured all medical help for them.
"The state government has assured all help will be given for treatment," Singh, who flew in here from Delhi by a special IAF plane, said.
Making an appeal for peace, he said, "I call upon the people to maintain calm in this hour of grief. I am happy that people of Hyderabad have refused to be provoked by this nefarious incident."
Singh had on Saturday strongly condemned the blasts, saying those responsible for the "dastardly" act would not go unpunished.