The Enforcement Directorate has issued a 'Look Out Circular' against Pune-based stud farm owner Hasan Ali Khan, accused of stashing black money abroad, to prevent his escape from the country.

The circular has been issued so that Khan is not able to escape the country pending investigation by various agencies, sources said. Khan, who is alleged to have stashed around USD 8 billion in foreign banks, had been earlier served a notice for a tax demand for about Rs 50,000 crore in 2009.