Two men were arrested Thursday after Charleston firefighters found more than fire inside their King Street apartment.

Charleston firefighters extinguished a couch fire at 1000 King St., Apartment 110, and then called police after they discovered 21 marijuana plants throughout the house, according to an incident report.

Charleston police officers obtained a search warrant for the apartment and found the plants on shelves, surrounded by heat lamps. The plants have a street value of $500 each, according to Charles Francis, public information officer.

Officers noticed a "glass smoking pipe" within arm's reach of the scorched couch, the report said.

A man home at the time told police he tried to put the fire out but couldn't, and that his roommates must have left the apartment while he was sleeping.

While police were talking to the resident, a second man came home and told police that he and his roommates "split the expenses to grow the stuff (marijuana) into thirds."

Police charged Dustin Wayne Stiles, 18, of Charleston and Justin Carper, 20, of Charleston with possession with the intent to manufacture and distribute marijuana.

Investigators have not determined an exact cause of the fire but suspect it was caused by careless smoking, according to Mark Ruppel, public information officer for the fire department.

Reach Andy Paras at 937-5589, aparas@postandcourier.com or on twitter at twitter.com/andyparas.