The Committee to Protect Journalists (CPJ) reports that 44 journalists were killed in 2010.
"We are thrilled, " said Joel Simon, executive director of the Committee to Protect Journalists.
According to the Committee to Protect Journalists, Syria was the most deadly country for reporters in 2012.
Gillis, Varela and Foley were detained by pro-government forces in early April, according to the Committee to Protect Journalists.
The Committee to Protect Journalists called on Pakistani authorities to reverse the order.
Saberi has been living in Iran since 2003, according to the Committee to Protect Journalists, a journalists' advocacy group.
CNN: U.S. journalist on hunger strike treated at prison hospital
According to the Committee to Protect Journalists (CPJ), Pakistan was the fourth deadliest country in the world for journalists in 2009.
Syria is ranked as the most dangerous country in the world for reporters by the campaign group Committee to Protect Journalists.
BBC: Ruined buildings in Marjeh, northern Syria (11 April 2013)
Saberi, who comes from North Dakota, has been living in Iran since 2003, said the Committee to Protect Journalists, a journalists' advocacy group.
CNN: Jesse Jackson offers to go to Iran to help free journalist
Carlos Lauria(ph), a Argentine journalist, led a delegation from the New York based Committee to Protect Journalists that recently met with government officials.
Arnett is a member of the Board of Directors of the Committee to Protect Journalists, which is trying to locate the missing journalists.
According to the Committee to Protect Journalists, Ammar Mohamed Zado, Ahmed Adnan Al-Ashlaq and Lawrence Fahmy Al-Naimi worked for the Shaam News Network.
In April 2010, Mr. Appelbaum's involvement in WikiLeaks was inadvertently disclosed publicly in a blog post on the website of the Committee to Protect Journalists.
WSJ: Court Order Seeks Email Data of WikiLeaks Volunteer Jacob Appelbaum
The photographer's release drew praise from the Committee to Protect Journalists.
According to the Committee to Protect Journalists, several international reporters have gone missing in Syria in recent weeks and are presumed to have been kidnapped.
Since February, the Committee to Protect Journalists has tallied more than 80 attacks on members of the news media in Libya, including four deaths and 49 detentions.
Global media watchdog the Committee to Protect Journalists (CPJ) said Mr Daou's arrest was "another example of Malian security agents acting outside the law in trying to harass journalists".
The Committee to Protect Journalists, in its annual report, recently announced that 28 were killed in Syria last year, making it the deadliest place worldwide to cover a story.
The Committee to Protect Journalists says at least 16 journalists have been killed in Syria since November, making it the most dangerous place in the world for journalists.
BBC: Syria conflict: Japan reporter Mika Yamamoto flown home
Those claims are "both ludicrous and funny, if it wasn't so sad, " said Mohamed Abdel Dayem, the program coordinator for the Committee to Protect Journalists' Middle East and North Africa program.
Mohamed Keita, an official with the Committee to Protect Journalists in New York, said the group was "troubled" by the arrests as there appeared to be no evidence linking the programme to the killings, AP reports.
According to the Committee to Protect Jounralists (CPJ), four journalists of Baghdad TV were injured on 1 March when the TV came under artillery fire by insurgents.
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