They say it amounts to scare tactics designed to stop outsiders from bidding on the company at next month's scheduled auction.
The parties have fought bitterly since the owners of The Philadelphia Inquirer, Philadelphia Daily News and Philly.com filed for bankruptcy in February, citing $400 million in debt.
A group of current and new investors hopes to win the auction with a bid that pays creditors about 22 cents on the dollar.
Creditors hope to take over and install new management.
