Published: Sep 01, 2010 4:06 PM EDT
Updated: Sep 01, 2010 1:06 PM EDT

ST. PETERSBURG, Fla. (AP) - Detectives are investigating how a bag of dynamite was discovered on the side of a Pinellas County road.

Officials say Ronald Knous found the dynamite in a plastic bag on Tuesday, then drove to the Pinellas County solid waste facility, thinking he could dispose of the explosives there.

Police from four agencies were called to the scene, and bomb squad technicians safely detonated the seven sticks of dynamite.

Roads in the area were closed temporarily, and no injuries or damage were caused by the controlled detonation.