UPDATE: BRUSSELS (AP) -- 28 people reported dead, 55 injured after terrorist attacks at Belgium airport and subway station.
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UPDATE: BRUSSELS (AP) -- Brussels transit spokesman Guy Sablon says 15 dead, 55 injured in attack at subway station.
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UPDATE: BRUSSELS (AP) -- Belgian federal prosecutor Frederic Van Leeuw is calling all three explosions in Brussels "terrorist attacks."
Two of the explosions on Tuesday morning hit Brussels' Zavantem airport and the third struck in the city's Maelbeek metro station. Belgian media report that at least 13 are dead, and authorities are saying there are dead at both sites.
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UPDATE: BRUSSELS (AP) -- Belgian federal prosecutor says at least one of airport blasts was probably caused by a suicide bomber.
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UPDATE: PARIS (AP) -- France's top security official says the country is reinforcing security at airports, train stations and metros after Tuesday's attacks in Brussels.
Interior Minister Bernard Cazeneuve said France immediately increased its vigilance after the attacks. France has been on highest alert since the Nov. 13 attacks in Paris that left 130 dead.
UPDATE: BRUSSELS (AP) -- Eurostar has suspended high-speed rail service to Brussels-Mid station following the attacks at the airport and a metro station in Belgium.
The rail service links London with Brussels and Paris via the Channel Tunnel.
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UPDATE: BRUSSELS (AP) -- British airports are increasing security and Prime Minister David Cameron is convening the government's emergency committee after the explosions at Brussels airport and on the city's subway system. Cameron said Britain would "do everything we can to help."
BRUSSELS (AP) -- Airport and subway blasts in Brussels have prompted a city-wide lockdown after at least 13 people were killed in what officials say are terror attacks. As many as 30 are injured.
A passenger just arriving at the airport described a scene with "blood everywhere, injured people, bags everywhere." European security officials have been braced for a major attack for weeks, and warned that Islamic State was actively preparing.