Members of the Jacksonville Sheriff's Office were at a home in Riverside Tuesday evening after a narcotics lab was found in a home on Dellwood Avenue, authorities say.

At this time, police do not know what the substance was inside the lab at the home on the 2800 block of Dellwood Avenue - just off Willowbranch Avenue. Bomb squad and the JSO narcotics unit are on scene and investigating.

It is common practice for JSO's bomb squad to accompany narcotics detectives to scenes to assist and make sure no volatile chemicals case any problems.