Access to the Sarawak Report website has been blocked by the Malaysian Communications And Multimedia Commission (MCMC) on grounds that it may undermine the stability of the country.
In a post on its Facebook site, the MCMC said the website was blocked after receiving numerous complaints from the public that it was posting unsubstantiated information.
"The website has been blocked under Section 211 and Section 233 of the Communications and Multimedia Act 1998," said the MCMC.
It also said access would be blocked until the Special Task Force looking into 1Malaysia Development Bhd (1MDB) completed its investigations.
It advised the public to be cautious when sharing information over social media, which could cause unrest and destabilise the country if it was false.
The Sarawak Report website has been a main source of allegations of wrongdoing regarding 1MDB, and has published several stories on the Government investment firm.