The Supreme Court on Wednesday sought a response from the Centre on a plea by Uma Devi, the widow of rationalist M.M. Kalburgi, seeking a SIT probe into his murder.Chief Justice Dipak Misra, Justice A.M. Khanwilkar and Justice D.Y. Chandrachud sought the response as Uma Devi demanded a coordinated probe in the killings of Kalburgi, Govind Pansare and Narendra Dobhalkar as the circumstance surrounding them were the same.Kalburgi was killed on August 30, 2015 in Dharwad in Karnataka and Uma Devi has alleged that the probe by the Karnataka Police had not made any headway.Uma Devi said the SIT must be headed by a retired judge of the apex court or a High Court. The notice has also been issued to the Central Bureau of Investigation, the National Investigation Agency and the Karnataka, Maharashtra and Goa governments.