The Enforcement Directorate has frozen security holdings of more than Rs 580 crore of a Dubai-based "hawala operator" and seized cash and valuables worth Rs 3.64 crore after fresh raids in the Mahadev app-linked money laundering case, official sources said on Friday. The latest raids were launched on February 28 at various premises in Kolkata, Gurugram, Delhi, Indore, Mumbai and Raipur.