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A deadly new drug a hundred times stronger than heroin has been found for sale in Northern Ireland for the first time. Forensic scientists detected fentanyl mixed in heroin seized by the PSNI in recent months. It's been linked to two deaths here and more than 60 in other parts of the UK this year. A former user tells how he got addicted. Also, the latest from Mexico City where rescuers are trying to reach at least three people they believe are still alive under the rubble of a school which collapsed during the devastating earthquake.