"The United States condemns any terrorist attack anywhere, period. We've always stood by that," Nikki Haley, the US ambassador to the United Nations, told CNN.
Panic broke out at the Dutch capital's main station shortly after midday Friday when the knife-wielding man stabbed two bystanders before he was shot and wounded by police.
Officials say the 36-year-old, who was shot dead by police after Thursday's stabbing spree in the town of Trappes, had major psychological problems and was on a watchlist of suspected radicals.
A London teenager was jailed for life on Friday for plotting a terror attack, becoming the youngest woman to be sentenced for terrorism offences in Britain.
Police were scrambling to unpick the motives of the attacker identified as Benjamin Herman.
Police in France have foiled a suspected terror attack and arrested two brothers of Egyptian origin, French Interior Minister Gerard Collomb said on Friday.
Police arrested a second person overnight believed to be linked to an attack in southwestern France on Friday that led to the death of four people, a judicial source said on Saturday.
Singapore on Tuesday proposed a new law to prevent people at terror attack sites from taking photographs or videos or communicating about police operations ...
Chris Parker, 33, had claimed to have helped some of those injured in last year's attack but CCTV footage shown at Manchester Crown Court captured him rifling through the purse of victim Pauline Healey.
The driver, who moved to America in 2010, mowed down pedestrians and cyclists over a mile-long stretch of a bike path on Lower's Manhattan's West Side, as children and their parents prepared to celebrate Halloween.