A patrolling party of the 191st Battalion of the BSF seized 1 kg of heroin from the Kulwant check post near Muthianwala village, 45 km from Tarn Taran on Saturday afternoon.The consignment is worth Rs 5 crore in the international market.JP Yadav, Company Commandant, said the consignment was buried under the ground and recovered by the patrolling party during its routine search.