Following a pair of explosions Tuesday that killed at least 11 people at the Brussels Airport (BRU), air traffic controllers diverted an estimated 50 planes. The airport, which averaged 56,000 passengers a day in February, had been expecting about 650 flights Tuesday.

Five hundred flights were canceled or rerouted, and 100 arrived or departed before the airport closed Tuesday morning, according to EUROCONTROL estimates.

Using flight position data from Plane Finder, the animation shows flights arriving at BRU early Tuesday morning. In the moments after the attacks at 8 a.m., inbound flights enter holding patterns and divert to nearby airports.