Qatar-based Al-Jazeera news network's mobile service was hacked Sunday, four days after its main Internet websites came under cyberattack, it reported on al-jazeera.net.

"The story claiming that the Prime Minister (Sheikh Hamad Bin Jassem) has been the target of an assassination attempt in the royal palace is completely false and was a result of hacking the service," the channel said in breaking news.

The main Arab satellite news channel said the claim was among three false texts sent via its mobile service.

Social networks, including Twitter, quoted Al-Jazeera's mobile service Sunday as saying that Sheikh Hamad was targeted in an attack on the palace in Doha and that the wife of the emir, Sheikha Moza Bint Nasser, was lightly wounded.

On Wednesday, the network said that a number of its websites had been hacked. Internet users reported that pro-Syrian regime slogans were posted on the broadcaster's main page.

Hackers left images of the Syrian flag and Al-Jazeera's site with the word "Hack" emlazoned on it, and a message saying the hack was in "response to the hostile position of the channel towards Syria, its people and government."

The message also claimed Al-Jazeera "spread false news."

Qatar has repeatedly voiced support for the Syrian opposition against President Bashar Al-Assad's regime and has openly called for the arming rebels in the country, drawing strong criticism from Damascus that accuses Al-Jazeera of pro-rebel bias.