Three bomb explosions have rocked Brussels Airport, followed by another blast at a metro station in the city, reportedly killing at least 23 people in total.
Belgian state broadcaster said the Tuesday blasts had left several dead and many injured. National security level was raised to its maximum.
Belgian broadcaster VRT said at least 13 people were killed and 35 severely injured after the explosions.
Another explosion was reported at Brussels Metro Station close to EU institutions, Belgian broadcaster RTBF said.
Some 10 people were killed the in metro station blast, local television channel VTM reported.
Several people were also injured in the explosion at Maelbeeck metro station.