The statement expressed Qatar's wishes for a speedy recovery to the injured.
The 19-year-old Afghan, who had been living as an asylum seeker in Germany, told investigators that he was angry about people in the Netherlands insulting Islam, NL Times reports. Witnesses said that the incident began as an argument on a train platform, which then escalated.
The victims, who were being treated in hospital for serious injuries, were identified as USA nationals. Police did not reveal the location of the residence.
Dutch authorities said Jawed S., who held a German residency permit, allegedly had a "terrorist motive".
"All scenarios are taken into consideration, including a terrorist motive", says a police statement, per the BBC.
Amsterdam City Hall said German authorities searched the suspect's home and seized data storage devices that would be analysed as part of the investigation.
Police quickly arrived at the scene with video images showing police ordering the suspect in English to "stay down" after he had been shot.
However, he declined to mention the Prophet Mohammed cartoon contest that Wilders had planned on holding but recently canceled due to security concerns.
Photos showed a man after he was shot lying on the floor of the train station as two police officers stood nearby with their guns pointed at him.
Amsterdam authorities are treating a stabbing incident as an act of terrorism after an Afghan immigrant residing in Germany attacked two American citizens over the weekend in the Dutch city.
The stabbing occurred in Amsterdam's Central Station which is the city's busiest train station.
The Netherlands has so far been spared from the slew of terror attacks which have rocked its closest European neighbors in the past few years.
Around 250,000 people travel through Central Station every day, according to statistics provided by the Amsterdam.info travel guide.