A cartoon by Sweedish cartoonist Olle Johansson.

Throughout Iran, we’re receiving reports that newspapers are being suspended and Iranian journalists are being arrested.

“Before the presidential election, some of Iranian cartoonist had drawn cartoon about the electoral competitions,” Iranian cartoonist Sepideh Anjomrooz told me by email. “But after the election Iranian cartoonists are silent. ”

“Independent Iranian cartoonists could not draw any cartoon about this situation, because we know that we have to observe the red lines, Anjomrooz said. “Not observing them could make [it a] dangerous situation for us. ” (View Sepideh Anjomrooz’s cartoons here)

Cartoonists aren’t the only journalists being affected by the crackdown.

Velayat, a newspaper distributed in the west Tehran town of Qazvin, has been suspended following the publication of a caricature of Mahmoud Ahmadinejad. according to the newspaper Sarmayeh.

Dow Jones is reporting that Kalameh Sabz (or Green Word), the Iranian newspaper owned by defeated presidential candidate Mir Hossein Mousavi, has also been suspended by authorities.

Yet another newspaper, Asr Eghtesad, was prevented from appearing Saturday because of its front-page headline: “The spring green advances,” a reference to the adopted color of Mousavi.

“Independent sources of news and information find it very hard to make their voice heard now in Iran because of the censorship,” Reporters sans frontières said. “The authorities are tightening their grip on all news media and means of communication that could be used to dispute Ahmadinejad reelection ‘victory’. They are doing everything possible to limit coverage of the consequences of the election fraud.”

Here are three recent cartoons from Mana Neyestani, the Iranian cartoonist who was jailed by the government for his cartoons, and who fled Iran to Malaysia.  Read more about Mana here and see the cartoon that landed him in jail.  (Thanks to Nik Kowsar.)