Dhaka, March 23 -- Several European countries have updated their travel advisories for the United States this week following the detention of multiple European nationals, including German citizens, upon arrival.

Germany's Foreign Office said it is taking the recent incidents involving German travelers seriously, reports Xinhua.

"We have clarified and now clearly emphasize that an Electronic System for Travel Authorization (ESTA) approval or a U.S. visa does not, in every case, authorize entry into the United States," a spokesperson told public broadcaster ARD's Tagesschau.

The advisory update follows reports of three German nationals being detained at U.S. entry points, including one green card holder. Two of the individuals have since...