Warangal: Former Congress MP Sircilla Rajaiah, his wife and son were arrested on Thursday night following their sustained grilling by police in connection with the death of his daughter-in-law and three grandsons at his residence here yesterday.

"Rajaiah, his wife and son have been arrested and produced at the residence of a magistrate," Assistant Commissioner of Police (Hanamkonda Sub-Division) Shoban Kumar told PTI.