A man suspected of hacking into the site of Vietnam’s top internet security firm at the weekend has been arrested, a company official said Wednesday.

Police worked with Bkav, a leading anti-virus software company, to arrest the man after the attack paralysed the company’s website for several days, Bkav director Nguyen Tu Quang said.

“Hackers are always trying to attack our site, but they are not always successful,” he said. Quang said the suspect was identified as a computer security employee at an information-technology company in Hanoi.