The mastermind of the hijacking , Zvonko Bušić , delivered a note to the captain in which he informed him that the airplane was hijacked , the group had five gelignite bombs on board , and another bomb was planted in a locker across from the Commodore Hotel in New York with further instructions .
It said that the hijackers had five gelignite bombs , and that a bomb had been planted in a locker across from the Commodore Hotel on 42nd Street in New York with the further instructions that the U.S. authorities should follow .