Washington:  A group of hackers, who had earlier attacked the US Senate's portal, have now claimed that they have breached into the CIA's website.

The website of the Central Intelligence Agency (CIA) faced problems in loading allegedly due to the breach.

The hacker group LulZSec tweeted on Wednesday “Tango down – CIA,” claiming that they were behind the cyber attack.

"Shortly after LulzSec sent the message on Twitter, the CIA's website was unable to load in multiple attempts on multiple browsers," a newspaper reported.

"We are looking into these reports," CIA spokesperson Marie E Harf said.

Earlier in the week, the same group claimed to have hacked the website of the US Senate.