Beijing, Feb 14 (IANS) Technology experts in China have warned internet users to be alert against computer viruses based on the Valentine’s Day theme.

The China National Computer Virus Emergency Response Centre issued a circular Monday warning computer users not to open spam mail with Valentine’s Day messages in the subject line.

Such mails may contain worms like ‘Worm_ Blebla.B’, ‘VBS_ILoveyou’ and ‘Vbs_Valentin.A’, according to China Daily.

The centre has warned online shoppers to be careful when ordering Valentine’s Day items as some pop-up advertisements may be bogus and cause computer problems.

Worms were also spreading through internet forums and online chatting tools, it said.