All Jewish primary and secondary schools in Amsterdam have been under increased security since Saturday, the Amsterdam office of mayor and aldermen reported to the city council. The city is providing extra protection at the schools before classes start, during operating hours, and when the children go home, NOS reports.

An explosion started a small fire at the Atrium office complex in Amsterdam’s Zuidas district overnight, the police confirmed to local media. Unverified video of the attack is circulating on social media, with reports that it was claimed by the same group that claimed earlier attacks on a Jewish school in Amsterdam and a synagogue in Rotterdam.

An explosive device detonated overnight against the outer wall of a Jewish school in Amsterdam-Buitenveldert, authorities said Saturday, in the latest in a series of incidents targeting Jewish institutions after a synagogue in Rotterdam was attacked with fire a day earlier.

Police and fire services responded to an explosion at a Jewish school overnight in what has been labelled by the city's mayor as a ''targeted attack against the Jewish community'