As reported by Agence France-Presse:
Brussels (AFP) - Belgium security forces tightened security at nuclear plants across the country after deadly attacks in the capital city of Brussels, the Belga news agency said.
"Surveillance is stepped up with added security measures at nuclear plants," the agency reported.
"Vehicles are being checked with police and army on site," the agency added.
In February, investigators probing the Paris attacks found video footage of a senior Belgian nuclear official at the property of a key suspect. (emphasis added)
The New York Times reported on the February revelation.
And the New York Times reported today that both the Tihange (photo, above) and Doel nuclear power plants in Belgium evacuated all non-essential workers as a security precaution, in the aftermath of the attacks. However, the reactors were allowed to continue operating, rather than shutting down as a security precaution.
Politico has cited Belgian t.v. news coverage of military and police moving in to protect nuclear power plants days before the attacks in Brussels.