TEHRAN (PPI) - A trilateral meeting between representatives of Afghanistan, Iran and Pakistan concluded in Tehran with agreement on measures to strengthen border cooperation between three countries in order to stem flow of drugs from Afghanistan. The meeting, part of Triangular Initiative brokered by UN Office on Drugs & Crime (UNODC), approved practical measures to improve trans-border cooperation to fight drugs and crime. It was agreed to establish three Border Liaison Offices (one on each of three borders) to plan and mount joint operations. Modalities will be worked out (at expert meeting in Kabul in June) to improve cross-border telecommunication exchange on counter-narcotics. Representatives of three countries were agreed to intensify interdiction of precursor chemicals under operation TARCET for which UN Office on Drugs & Crime (UNODC) was providing training and equipment. Iran will establish a permanent secretariat for Triangular Initiative and a regional center for intelligence exchange, through UNODC's assistance. A key point of discussion was how to prevent abuse of Afghanistan Transit Trade Agreement (ATTA) and TIR (international road transport) regulations. "We need to ensure that ways to facilitate trade are not exploited by smugglers of guns, chemicals, and weapons", said UN Office on Drugs & Crime (UNODC) Executive, Antonio Maria Costa. Following up Tehran meeting, experts will develop a common policy on control of sea and land commercial trade (particularly containers) under Afghanistan Transit Trade Agreement (ATTA)  & TIR. Participants stressed devastating impact of opium and heroin on their countries, and urged international community, particularly Europeans, to reduce demand for drugs and support Triangular Initiative.