A pervert karate instructor who raped his 13-year-old student could have abused other victims.

Police have not ruled out the possibility that Paul Rudwick, 43, preyed on other young girls.

The blackbelt, who has made a number of martial arts films aimed at children, was jailed for 14 years last week after being convicted of raping and abusing a 13-year-old girl, who cannot be named for legal reasons.

Detectives have not received firm evidence to suggest Rudwick, from Seaton Park, Littlehampton, carried out other sex attacks.

But they believe there could be a string of other children who may have been abused by the pervert but have stayed silent.

Now they are urging anyone who may have been a victim of Rudwick to come forward, even if they have been scared to in the past.

Detective Constable Tim Hughes, of Sussex Police, said: "At the time of the initial investigation we spoke to a lot of other people who had contact with him and none of them made any disclosures to us.

"But that is not to say he did not attack others. It may be they were reluctant to come forward and may now feel they can because he is behind bars.

"We would certainly investigate any allegations which are made."

Rudwick, who has made videos with titles such as "Karate For Kids", worked at a number of schools and clubs in the Worthing area, teaching martial arts.

He befriended the 13-year-old and her family before brutally raping her.

He went on to have sex with her on numerous occasions during a two year reign of terror between 2004 and 2006, often after picking her up from school.

Chichester Crown Court was also told how Rudwick would punch and slap the girl.

On one occasion he made her perform a sex act on him while other children watched.

He was caught after DNA belonging to both him and the girl was found on condoms in a bin at his home.

Rudwick denied 12 charges of rape, indecent assault, having sex with a child, causing actual bodily harm and intimidating a witness.

However a jury took less than three hours to convict him on all counts.

It is known that the martial arts expert had contact with numerous other children both through his classes and through parties he held at his home.

DC Hughes urged anyone who believes they may have fallen prey to Rudwick to contact Sussex Police on 0845 6070999.

He said: "We would absolutely listen to anything other potential victims may have to say.

"I have received a telephone call since the case ended from someone who said they had contact with him.

"It may well be that people feel much safer about coming forward now, or much safer talking about things, now he has been convicted."