New York Times website hit again after yesterday's attack

The New York Times website was down again this morning, with readers receiving an error message saying the webpage is not available - a day after a hacker group calling itself the "Syrian Electronic Army" claimed responsibility for an attack on the same site.

The same group also claimed responsible for attacks on Twitter.

The Times site was offline most of the morning and was up for most users by 11 a.m.

Today makes the third time this month the newspaper's website was attacked.

Within minutes of yesterday's attack, the New York Times quickly set up alternative websites, posting stories about chemical attacks in Syria. "Not Easy to Hide a Chemical Attack, Experts Say," was the headline of one.

The service was restored early today, but then was hit again.

The Times blamed the disruption on, "an external attack on our domain name registrar, and we are at work on fully restoring service."

The cyberattacks come at a time when the Obama administration is trying to bolster its case for possible military action against Syria, where the administration says President Bashar Assad's government is responsible for a deadly chemical attack on civilians. Assad denies the claim.

"Media is going down ..." warned the Syrian Electronic Army in a Twitter message before the websites stopped working, adding that it also had taken over Twitter and the Huffington Post U.K.