Staff return as Brussels airport prepares to resume operation

Ryanair are routing flights through Charleroi, while Aer Lingus has extended its offer for refunds

Staff return as Brussels airport prepares to resume operation

Belgian police and soldiers secure the area outside Zaventem Airport in Brussels, Tuesday, March 29, 2016. (AP Photo/Geert Vanden Wijngaert)

One week after Brussels was targeted by Islamist extremists, staff at the city's airport have returned to the site where 15 people died.

The employees are taking part in a series of test runs to see if the airport can resume some flights.

The airport's chief executive has warned it could take months to be fully operational again.

Meanwhile, Ryanair says all flights due to operate to and from Zaventem up to and including Friday April 1st will continue to operate from Charleroi airport.

"Customers booked to fly from Brussels should make their way to Brussels Charleroi, arrive at least 3 hours before their flight and allow extra time for additional security checks," it said.

Aer Lingus has extended free changes or refunds for guests travelling to and from Brussels up to April 8th.

A total of 35 people died in suicide attacks at the airport and at a metro station in the city last week.