North Korea says the final results of its investigation of a crashed drone found in Pyongyang show it belonged to the South Korean military. The North has warned that another intrusion could lead to a retaliatory attack.

Monday's edition of North Korea's ruling Workers' Party newspaper, Rodong Sinmun, carried a statement by a defense ministry spokesperson.

The North had said that the drone discovered on October 13 was the same type as a reconnaissance vehicle used by the South Korean military. It also said the South likely used the drone earlier this month to scatter propaganda leaflets over Pyongyang.

The newspaper says the analyzed data retrieved from the drone includes location information in chronological order and charts showing flight routes.

The statement says the drone took off from Baengnyeong Island, near the de-facto inter-Korean maritime border in the Yellow Sea off the western coast of the Korean Peninsula, late at night on October 8.

The drone reportedly reached Pyongyang about two hours later and scattered propaganda leaflets in the area around the foreign ministry and over the defense ministry.

The statement also says the flight logs show the drone was in South Korean territory for the entire time up to October 8.

It says this evidence proves the South Korean military was behind the "hostile infringement" of the North's sovereignty.

It warns that should there be a recurrence, the North would not hesitate to take action against what it called the source of provocations and that they would "disappear forever."

The South Korean military has said it cannot confirm if Pyongyang's claims are true.