The channel's news director, Ali Wajih, said in a phone interview that he had not received any information from Mosul police, and he hoped the killings would be investigated.
"This is not new for al-Sharqiya. This is usual for Iraq, that they kill journalists," he said, adding that 16 of the channel's employees have been killed since 2003. Among them are four who were kidnapped and killed in 2008 while on assignment in Mosul.
Iraq was the deadliest country in the world for journalists between 2003 and 2008. Although members of the media continue to face intimidation, the New York-based Committee to Protect Journalists has not reported a murder of a journalist in the country since September 2011.
At least six members of Sunni militias opposed to al-Qaida were also killed Saturday. The militiamen were members of the Sahwa, which joined U.S. troops in the fight against al-Qaida at the height of Iraq war. Its members have since been frequently targeted by Sunni insurgents, who consider them traitors.
Gunmen attacked a two car convoy carrying local Sahwa leader Issa al-Sabeel in the predominantly Sunni town of Hawija, said police chief Col. Fattah Mahmoud Yassin. He said the militia leader survived but three of his bodyguards were killed.
Hawija, 240 kilometers (150 miles) north of Baghdad, was the scene of a deadly shooting at an anti-government protest by Iraqi security forces in April.
A bomb also hit a checkpoint manned by Sahwa members in the town of Youssifiyah, south of the Iraqi capital, killing three of the fighters and wounding five other people, police said.
Hospital officials confirmed the casualties. The officials spoke on condition of anonymity because they were not authorized to speak to journalists.
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Associated Press writer Qassim Abdul-Zahra contributed reporting.
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