Brussels Faces Security Concerns After Package Discovery
Packages were discovered on platforms 18 and 20 at 5:20 pm.
Trains were suspended, disrupting peak-hour travel.
Incident occurred a day after Belgium commemorated 2016 Maelbeek/Zaventem bombings.
2016 bombings killed 32 and wounded over 300.
Belgium maintains threat level at 'serious' due to 2023 attack killing two Swedish fans.