The two people injured in a stabbing at the Dutch capital's central railway station on Friday were identified as US citizens.
The pair were tourists visiting the Netherlands, said US Ambassador Pete Hoekstra in a statement.
Dutch police shot and wounded a suspect following the stabbing in Amsterdam's central railway station.
Police tweeted on Saturday the two victims remained in the hospital.
The suspect, a 19-year-old Afghan man, also remains in the hospital under police vigilance and will be interrogated during the day, said a police statement.
A motive for the attack was not immediately clear, but police said investigations into the incident were underway.
Local television station AT5 reported the incident followed an argument.