Pakistan is blocking access to Facebook in response to an online group calling on people to draw the Prophet Mohammed, officials said Wednesday.
The Pakistan Telecommunication Authority issued the order a day before "Everybody Draw Mohammed Day," scheduled by a Facebook group with the same name.
"Obviously it (the blocking of Facebook) is related to the objectionable material that was placed on Facebook. That is why it is blocked," said Khoram Ali Mehran of the telecommunication authority.
"We have blocked it for an indefinite amount of time. We are just following the government's instructions and the ruling of the Lahore High Court. If the government decides to unblock it then that's what we will do," he told CNN by phone.
The organization has not received any complaints from internet users about the blocking of Facebook so far, he said. Devout Muslims consider it offensive to depict Mohammed.
There were riots around the world in response to a series of cartoons of Mohammed in a Danish newspaper in 2005, and at least two European cartoonists live under police protection after publication of their drawings of the Muslim prophet.
The administrators of the "Draw Mohammed" group did not immediately respond to a CNN e-mail.