Hong Kong  - Heroin has been found by police in the hotel room of a Hong Kong pop star arrested in Tokyo, news reports said Tuesday.

Ten packets of the drug were found in the hotel room of Jill Vidal, 26, also known as Wei Si, after her arrest in February, the Hong Kong Standard reported.

Vidal has been held in custody since her arrest with fellow Hong Kong pop star Kelvin Kwan on suspicion of possessing cannabis. Kwan was released on March 28 without charge.

Sources quoted by the Standard said the amount of heroin found in Vidal's room was sufficient for Japanese authorities to press ahead with a drug-trafficking charge.

However, a report in the rival South China Morning Post quoted a Hong Kong government source as saying 2 to 3 grams of heroin were found and that Vidal was likely to be charged with possession.

No charges had been laid, but Vidal was likely to be jailed for one to two months, then deported if a case against her proceeded, the source said.

Hong Kong narcotics police were working with Japanese police to investigate the source of the drugs found in her hotel room, the Standard said.

Vidal and Kwan, 25, were arrested February 24 in a Tokyo shopping centre when shopkeepers claimed a foreign man was shoplifting.

A police search allegedly found a small quantity of cannabis in a packet of cigarettes Kwan was carrying, and the two were taken into custody.

Ironically, both stars took part in anti-drug campaigns in Hong Kong aimed at stopping youngsters from getting involved in drug abuse before their arrest in Tokyo.

Kwan, who holds a Canadian passport, is said to have told Tokyo police he brought the cannabis with him from Hong Kong for his own personal use.

Vidal, a British passport holder, reportedly denied all knowledge of the drugs at the time of her arrest.

The pair are among a host of young pop stars from Hong Kong whose so-called Canto-pop music is hugely popular with audiences in mainland China, Taiwan and overseas Chinese communities. (dpa)