A brother and sister from America have gone missing following the deadly terrorist attacks in Belgium, leaving family and friends desperately searching for information.

Sascha and Alexander Pinczowski were checking in at Brussels main airport when bombs went off, People reported.

"Alex is the sweetest person ever," Mark Lewis, a friend, told the publication. "After the explosion we haven't heard from them. We tried all hospitals with no luck. Their mom was the last to speak to them, but their call was cut off after the explosion."

On social media, friends and family of the siblings are asking for any help in locating them.

In all, 32 people were killed in the attacks. More than 250 others were injured.

READ MORE:

• Even After Deadly Attacks, Were Stronger Together
• Harrowing Video Shows Train Evacuation After Brussels Attacks
• Cities Worldwide #PrayForBrussels
• Obama Still Wants To Talk To Enemies, But He's The Only One
• Brussels Universities Help Students Stranded After Attacks
• U.S. Cities Tighten Security After Deadly Brussels Attacks
• Black Day For Europe: Leaders React To Brussels Attacks
• Obama On Brussels Attacks: 'We Must Be Together' To Fight Terrorism
• Phone Companies Offer Free Calls To Belgium After Attacks
• Turks, Still Reeling, React To Brussels Carnage: I Share Their Pain
• Belgians' Worst Fears Realized After Months On High Terror Alert
• Belgian National Soccer Team Preaches Love In Wake Of Attacks

For additional coverage in French, visit Le Huffington Post . For coverage in German, visit HuffPost Germany . For coverage in Spanish, visit HuffPost Spain . For coverage in Arabic, visit HuffPost Arabi .