The layoffs take effect March 28, but employees have been told that they can leave immediately, according to chron.com.

Jay Devine, a spokesman for Philadelphia Media Holdings, said the slumped advertising market forced the company to make cuts. Devine added that the company has added editorial workers and is completing a plant investment that will put more color into the papers.

"We continue to make prudent investments in areas of growth that are critical to the organisation while also being as absolutely efficient as we can be in all other areas," said Devine.

Philadelphia Media Holdings just laid off about 100 editorial and advertising workers more than a year ago, chron.com reported.