When firefighters responded Sunday to a house in the 5000 block of Madison Road, they discovered the fire was caused by a pot-growing operation that filled the entire vacant house, officers said.

Members of District 2's Violent Crimes Squad found 110 pounds of marijuana, almost all of which came from a dozen large plants and almost 90 smaller ones, Officer Tom Rackley said. They also found another pound that was processed and ready for sale, he said.

Officers arrested John Tytus, 38, who lived across the street from the house. In his house, they found some marijuana in the toilet they say he apparently tried to flush.

Tytus was charged with cultivation of marijuana and trafficking in marijuana - both first-degree felonies because of the quantity. He also was charged with drug possession. Police also found some cocaine.

Tytus was released from jail Monday after someone posted 10 percent of his $3,000 bond.

Officers said the larger plants were heavy enough that it took two officers to carry them.