Brussels remained in a state of partial lockdown Monday morning as police continued to carry out terror raids across the Belgian capital.

Police are warning of possible terror attacks in the city of 1.2 million similar to those that killed 129 people and left at least 250 injured in the Nov. 13 attacks on Paris.

Five more people were arrested Sunday night in Brussels, bringing the total to 21 people arrested as authorities carry out raids in both Brussels and Charleroi, according to federal prosecutor Eric Van der Sypt.

However, no firearms or explosives have been found in the raids, which means the threat may not be over. The terror alert is currently at its highest level in Brussels. Salah Abdeslam, a key suspect in the Paris attacks who fled to Belgium after, has still not been found and remains on the loose.

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