A computer hacker who vandalized a pro-Israeli group's Web site said law enforcement officials have issued an arrest warrant for the wrong person.

In an online interview today, a Pakistani hacker who calls himself Doctor Nuker said he was responsible for the Nov. 2000 attack on the Web site of the American-Israel Public Affairs Committee (AIPAC). But the hacker claimed a federal grand jury made a mistake last week in indicting Misbah Khan of Karachi on four computer crime-related counts. "It's a girly name, sort of like calling a guy Mary Smith," said the hacker, who claimed he is a 35-year-old male and that several other people have used his nickname to deface sites. In the defacement of the AIPAC site, Doctor Nuker posted a rant about Israel's treatment of Palestinians, along with credit card numbers and e-mail addresses of some of the group's members. Each of the offenses carry fines of up to $250,000 and jail sentences of up to ten years, according to the Justice Department. The FBI will not disclose how it discovered the identity of Doctor Nuker, a prolific Web site defacer and founder of a hacking group known as Pakistan Hackerz Club. The IP address contained in several e-mail messages from Doctor Nuker to Newsbytes this month indicated he was using an Internet service provider in Karachi. But the hacker claimed he merely uses insecure servers in Pakistan to get online anonymously.