Amsterdam’s three Jewish schools reopened on Monday with added security after closing on Friday because of concerns about the safety of staff and pupils.

School officials and Jewish community officials had requested security at the three locations for the entire period the schools are open and that has now been agreed after “intensive talks” with the local authority and security experts.

Meanwhile, police have now upped the estimate of how many people took part in Sunday’s pro-Palestine demonstration in the capital from 10,000 to 15,000. They also said that three people were arrested.

One was picked up for carrying a banned Hamas flag and two others were arrested later in the day for covering their faces and threatening a police officer during scuffles close to a small counter-demonstration by Israel supporters.