The vigilant dog squad of Mumbai Airport Customs intercepted a kg of heroin worth Rs 1 crore, concealed in chocolates, from an Ethiopian national yesterday.

The dog squad headed by Sameer Wankhede, deputy commissioner, Air Intelligence Unit (AIU), intercepted Iyonda Elizabeth, who was travelling back to Addis Ababa on an Ethiopian Air flight, at the customs screening centre at 4.30 am.