Jason Perkins said Tuesday in a tweet that he, brewery founder Rob Tod and four other workers were trying to return home from Belgium. With the airport closed and emergency workers on the scene, the group opted to travel to Paris for a return flight to Maine.

Jeff Pillet-Shore, Allagash marketing director, said the six were among 10 Allagash workers visiting Belgium to celebrate employees who've spent five years with the brewery. Allagash was a pioneer in making Belgian-style beer in the U.S.

The Islamic State group says it carried out the attacks that killed at least 34 people at Brussels' international airport and a subway station. (AP)