Lakshadweep/Kochi, Sep 30 (UNI) The Bharatiya Tatrakshak, in a joint operation with the Anti-Terrorism Squad (ATS), Gujarat, has intercepted an Iranian dhow in the Arabian Sea, west of Lakshadweep, and seized around 526 kg of heroin and methamphetamine valued at over Rs 3,000 crore in the international market.