Citytv shed 6% of its workforce across the country on Tuesday, affecting mostly newsroom operations with the cancellation of its noon-hour and 5 p.m. newscasts.

Longtime City personalities including Anne Mroczowski and Laura DiBattista are said to be among those cut, according to sources, though representatives at City and parent Rogers Media did not confirm details.

Also said to be among the cuts are several reporters, including Pam Seatle, producers, graphics artists, camera operators and editors. (Know more? Email us!)

Rogers did not specify the number of jobs affected, but said its morning Breakfast Television and CityLine shows will still be produced for all markets, while CityNews at Six and CityNews Tonight at 11 p.m. will be delivered for the Toronto market only. City employs roughly 1,000 people across its five stations.

A spokesperson for Rogers says the layoffs came as the company focuses ‘on areas of the business that deliver the best results.’

‘Today’s changes, although difficult, are necessary to align our operations with the economic and regulatory realities of our industry,’ commented Rogers Media Television CEO Leslie Sole in a release.

It’s the fourth round of layoffs at Rogers, which dismissed about 900 employees, mostly in its cable and wireless business, in December. These followed cuts in early ’09 to its publishing division and some 100 job losses in December ’08, following the death of founder Ted Rogers. The cuts in 2008 included about eight jobs at Citytv in Toronto.

Mroczowski joined the Toronto station in the late ’80s and co-anchored CityNews at Six alongside Gord Martineau. Di Battista was a health specialist and co-anchored the CityNews at Noon newscast with Francis D’Souza.

Rogers picked up the Citys, which include stations in Winnipeg, Edmonton, Calgary and Vancouver, in 2007, when CTVglobemedia was forced to drop them by the CRTC, as a condition of its purchase of CHUM.