THIRTEEN women have told Gwent Police that their drinks were spiked with date-rape drugs in the past two months, Gwent police say.

This brings the total number of people claiming to be spiked up to 20 since the launch of the All Wales Spiked Campaign on December 11. But none of the reported incidents have led to convictions, mainly through a lack of forensic evidence.

Spiking, where drugs like GHB and Rohypnol are put into drinks, can make the consumer feel very drunk and vulnerable to sexual attack.

The Welsh campaign had been due to end in January but police say, as a result of the complaints, they are to extend it for a year.

And police are urging those who feel they have been spiked or have had their drinks tampered with to contact them immediately.

Gwent police drugs education officer, Detective Constable Lyn Webber, said: "We have had 13 drink spiking incidents since Christmas. "Unfortunately there is very little we can do as the complaints come in so late.

"We need victims to report any suspicions immediately so we would have a chance of getting forensic evidence, such as fingerprinting from the glass.

"If they suspect a drink is spiked take it to the police without drinking it or go to the manager of the licensed premises."

He said pubs and clubs in Gwent were taking part in the campaign by putting up advice posters on how to avoid being spiked.

Tips to make sure you are safe: Be wary about accepting drinks from anyone you do not know well enough to trust..

If you do accept a drink make sure it is in an unopened container or you see it poured.

Do not leave your drink unattended, even to go to the lavatory.

If returning to an unattended drink, leave it and get a new one.

If you start to feel strange, keep a close friend with you at all time.

If you think you are a victim notify police immediately.