The Enforcement Directorate (ED) has provisionally attached seven immovable properties worth Rs 1.5 crore in connection with a money-laundering case involving unauthorised routing of bulk SMS traffic through BSNL’s network. The probe, based on a CBI FIR, alleges that BSNL engineer Swarnjeet Singh and associates enabled illegal SMS routing, causing BSNL a revenue loss of Rs 5.42 crore.