The government is conducting a trajectory test to find out the truth behind this month's killing of a South Korean tourist by a North Korean soldier at the North's Mt. Geumgang resort.

A spokesman for the Unification Ministry said Monday that a government investigation team started a mock trajectory test on the East Coast on Sunday. The test was witnessed by experts from the police and the National Institute of Scientific Investigation (NISI).

The test will be completed on Monday.

The investigation team will reveal test results after the NISI analyzes and reviews them.