The case is being investigated under Section 6 of the Explosives Act 1957.

Local police say an explosives team have investigated a package at the building in downtown The Hague and had subsequently allowed people to re-enter, about an hour after they had been ordered to leave.

Of those wounded on Sunday, two of the five people being treated in intensive care are in a critical condition.

Nobody has claimed responsibility for the blast.

Saturday's attack was the deadliest since a truck bomb exploded at the same intersection in October 2017, killing more than 500 people.

A 37-year-old male passenger on board the flight from San Francisco had claimed there was a bomb in his hand luggage, Singapore's defence ministry says.

Islamic State, a Sunni Muslim militant group, claimed responsibility for the attack.

Security concerns have risen across Afghanistan as the country prepares to mark Eid on Sunday under Taliban rule for the first time in more than 20 years.

Children are believed to be among the dead in the blast on Friday at a mosque in the northern province of Kunduz.

The bomb, packed with nails and shrapnel, targeted a pork restaurant on the outskirts of the capital.

There was no immediate claim for the bombing but moments later shelling by government forces killed eight people in the Idlib region controlled by groups that have claimed such attack in the past.

There was no immediate claim of responsibility for the attack, but the Islamic State group, bitter rivals of the Taliban, has claimed similar recent atrocities.