Nadda and the five others boarded the lift in the ground floor to go to the fourth floor, but it suddenly came down with a loud noise, BJP MLC Ramachandra Rao, who was inside the elevator, told PTI.
Policemen and party activists brought them out safely and none sustained any injuries, he said.
The reason for the lift falling was not known immediately and that the matter would be looked into, Raosaid.
Along with Nadda, Union Ministers Nirmala Sitharaman and Bandaru Dattatreya also attended a public meeting organised on the occasion.