During 1979, there were 3,092 explosives-related incidents reported to (ATF). This is a 5 percent decrease from the 3,256 incidents reported in 1978. Criminal bombings reported in 1979 dropped to 1,469, a decrease of 16.8 percent from 1978. Accidental explosions decreased by 15.5 percent, from 71 incidents in 1978 to 60 in 1979. Vandalism and revenge continued to be identified as primary motives, while residential and commercial properties continued to be primary targets of the criminal violator. There were 335 stolen explosives incidents reported to ATF in 1979, a 7.4 percent decrease from 1978. Recovery was achieved for 84,197 pounds of explosives through seizures, abandonments, or undercover purchases, a 12.3 percent increase over the amount recovered in 1978. Tabular data are provided for arson incidents investigated by ATF for 1979, the motives for the incidents, and the types of accelerants used. Significant 1979 explosives-related incident investigations are described by State.