Five people were injured, including two Americans, in a "serious" stabbing attack that occurred in broad daylight in Amsterdam's city center on Thursday, police said. The suspected assailant is in custody and a motive remains under investigation into what authorities are considering might have been a random attack, police said.

The victims were a 26-year-old man from Poland, a 73-year-old Belgian woman, a 19-year-old woman from Amsterdam and a 67-year-old woman and a 69-year-old man, both American nation