Home Minister Rajnath Singh on Friday reviewed the situation in Uttar Pradesh's Mathura city where a police sub inspector and superintendent of police among 20 others were killed during an anti-encroachment drive."Spoke to UP CM Shri Akhilesh Yadav and reviewed the situation in Mathura. I have also assured him of all possible help from the Centre," tweeted Singh. He further tweeted: "Anguished over the loss of lives in the incidents of violence in Mathura. May God give strength to the bereaved families to bear the loss."On Thursday, a mob went on rampage after police took action against them for encroaching upon a major part of a government land.