A POTENTIALLY lethal drug has been stolen from a house in the Crosshill area of Greetland. Police in Halifax are appealing for information about the 500ml bottle of Oramorph, stolen during a robbery yesterday. Oramorph is a potent pain killer and can be lethal if taken unnecessarily. Police are asking anyone who is offered such a drug or sees a discarded bottle of it in the street to contact Pc Linda Tolley at Halifax CID on 0845 6060606.