Actor Amitabh Bachchan has received a fresh email threatening bomb blasts at his Mumbai residence, Jalsa, police said on Friday. The message also named the Bombay High Court and Mahalaxmi Racecourse. Police conducted searches at all three locations but found nothing suspicious. An investigation is underway to verify the email's authenticity, trace its origin and identify the sender. Bachchan had received an earlier threat email on October 23, which also mentioned his Juhu residence.