North Korea says it has detained another American tourist for an alleged unspecified crime.

The official Korean Central News Agency said Friday that authorities are investigating the American for allegedly doing acts inconsistent with the purpose of a tourist visit.

KCNA says the American went to North Korea on April 29. The person would be the third American currently held in North Korea.

In April, North Korea said it had detained an American for improper behavior while entering the country as a tourist. He was identified as Miller Matthew Todd — possibly putting his surname first.

North Korea has been holding a Korean-American missionary, Kenneth Bae, since November 2012. Bae was sentenced to 15 years of hard labor for what the North says were hostile acts against the state.