Mumbai Crime Branch on Friday arrested notorious gangster Ravi Mallesh Borra, alias DK Rao (59), a long-time aide of underworld don Chhota Rajan, along with two others for allegedly threatening investors on behalf of a builder who had defaulted on payments worth over Rs 1 crore.

This marks Rao’s second arrest this year — he was earlier nabbed in January for issuing death threats to a hotelier in a separate extortion case.