The children involved had not been vaccinated and one of them may have caught the disease when on holiday, the broadcaster said.
One of the children is over the age of 14 months, when it should have been vaccinated against the disease, but the others are younger.
The children in The Hague bring the total measles cases in the Netherlands to 12 so far this year, compared with an average annual infection rate of 10 to 20.
The disease is particularly dangerous for pregnant women and very small children.
At the moment 90.2% of Dutch children are vaccinated against potentially serious illnesses such as measles, polio and whooping cough.
Vaccine uptake has been declining, prompting a government information campaign while daycare centres have been demanding the right to refuse children who have not been vaccinated.
In total, 2,600 people were diagnosed with measles and the outbreak was concentrated in families with young children who had not been vaccinated for religious reasons. »