NEW YORK (CBSNewYork/CBS News) -- A New York-based hacker collective claimed responsibility after Republican presidential candidate Donald Trump's campaign website went offline Saturday morning.

CBS News reported New World Hacking, which purports to focus its attacks on terrorist groups such as ISIS, added that it was a "1 hour test."

The website was back online early Saturday afternoon.

An archived snapshot of DonaldJTrump.com remained online during the outage thanks to CloudFlare, the company that powers the site, CBS News reported.

Meanwhile, an error message on the mobile version of the site read: "We're experiencing an unusually high volume of traffic at the moment. We're Honored That so Many People Want to Show Their Support to Help #MakeAmericaGreatAgain!"

New World Hacking recently claimed responsibility for shutting down the BBC News website for several hours earlier this week, CBS News reported.

According to BBC technology correspondent Rory Cellan-Jones, the group launched a Distributed Denial-of-Service (DDoS) attack against the site as a "test" of their systems, CBS News reported.