SACRAMENTO, Calif. (AP) _ Two anti-government militiamen face a Dec. 20 hearing on weapons charges in an alleged plot to create a propane explosion so disastrous that it would lead to a government overthrow.

Both prosecutors and a defense attorney expect more charges against Kevin Ray Patterson, 42, and Charles Dennis Kiles, 49. They were arraigned Tuesday on federal firearms charges. They could face up to 30 years each on those charges.

Magistrate Judge Dale Drozd ordered Kiles held without bail, ruling that he was a flight risk, and scheduled a hearing Thursday to determine if Patterson should also be denied bail.

The men hoped that blowing up the tanks in a Sacramento suburb would force martial law and protests leading to an overthrow, federal agents allege in affidavit used to secure a search warrant.

More than 50 firearms, 50,000 rounds of ammunition and 30 pounds of fertilizer that could be turned into explosives were seized from the men, prosecutors said.