Days after attacking the marketing website of the Bay Area Rapid Transit (BART), San Fransisco, hackers have hit its police union website and leaked personal information of over a hunred officials online.

However, though the news was announced by Anonymous, the online hactivist group has not taken responsibility of the attack.

Anonymous tweeted that the personal information of 102 BART police officers, including home addresses, emails and passwords, had been leaked.

So far no group has claimed responsibility for the breach.

Anonymous said on Twitter, "Some random joe joined a channel and released the data to the press."

The union’s website http://bartpoa.com/ remains shut down.

BART is reportedly investigating the breach.

Last week, it was revealed that Anonymous had attacked a related website — mybart.org — of BART in retaliation for the San Fransisco subway’s decision to block mobile phones to thwart a planned protest over a fatal shooting of a homeless man in July.

Authorities said that the man was hot in self defence but the explanation could not quell public anger which turned into protests.

BART blocked mobile phone services to thwart the protests, a move believed to have earned the ire of hackers.

Anonymous — infamous for their attacks against Visa, Mastercard, Sony and The Sun — stole and posted the details of over 50,000 email subscribers of mybart.org.

After the hack, Anonymous had said online that BART made a "conscious decision of ordering various cell phone companies to terminate services for the downtown area inhibiting those in the area from using cell phones — even in the case of an emergency."

"Anonymous will attempt to show those engaging in the censorship what it feels like to be silenced," said the group.

Later, the hactivist group launched Operation BART against the agency’s alleged censorship of people’s rights.