All the CTX9400 luggage scanners installed at Suvarnabhumi international airport and at other airports are capable of detecting explosives and not firearms, said Mr Nitinai Sirisamathakarn, director of Airports of Thailand, on Tuesday.

He pointed out that there were several questions raised by members of the public about why the CTX9400 luggage scanners failed to detect the small handgun belonging to Pol Lt-Gen Kamronwit Thoopkrachang, former commissioner of Metropolitan Police.

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