Ratangarh is a town and Tehsil of the Churu district in Rajasthan, India. Ratangarh was previously called Kolasar. It is famous for grand havelis with frescoes, which is an architectural specialty of the Shekhawati region. From Wikipedia
Police say Operation Gaanjaney by ATS-ANTF used human tips with technical intelligence to trace Bajrang Singh to Ratangarh.