A cyberstalker who bombarded a woman with more than 500 emails is being sought by police after failing to appear at court.

Robert Hogg, 47, was due to attend Dundee Sheriff Court on Monday but failed to turn up to learn his fate.

He had earlier admitted a stalking charge committed between January 1 and March 25.

The court heard how he had sent more than 500 emails, with the woman left "frightened" by their content.

Sheriff Lorna Drummond QC issued a warrant for Hogg's arrest.

Fiscal depute Stewart Duncan earlier told the court: "The complainer was using her laptop and noticed a large amount of emails in her junk mail folder. She opened the folder and found 500 emails from the accused.

"She opened several of them and was frightened by their content, some of which related to her studies, some were of a sexual nature and others referred to conversations she had with her father on Twitter."

The woman then blocked Hogg on the social networking site but that only prompted him to send her a further 25 emails in the next seven hours.

Some of those referred to the fact he had been blocked by her on the site. The victim then contacted police, who raided Hogg's home and seized two computer units.

They discovered all the emails had been sent from addresses attributed to Hogg and internet searches about her had been carried out.

Hogg accessed her Twitter account several hundred times and saved various photos of her from her public profile into a folder under her name.

The fiscal added: "Some of the emails were of a sexual nature and some implied he had been watching her at her work."

Hogg pleaded guilty to a charge of stalking the woman between January 1 and March 25 this year.

Defence solicitor Ross Donnelly said: "Other emails were screeds of material which he had copied and pasted from the internet and sent to her, some of which is not only sexual but of an unusual nature.

"There is a background that needs to be explored further."