TOKYO, June 21 (Reuters) - Japanese Prime Minister Yoshihide Suga said on Monday that he would not rule out holding the Summer Olympics in Tokyo without spectators if the capital was under a state of emergency due to COVID-19 worries.

"In the event a state of emergency was declared then we can't rule out not having spectators," Suga told reporters during a tour of a vaccination site in Tokyo.

Olympic organizers are expected to decide later on Monday on whether to allow spectators at Olympic events, which begin next month. Suga lifted a state of emergency for Tokyo last week, but kept in place "quasi-emergency" restrictions until July 11.

(Reporting by Atsuko Aoyama; Editing by Kim Coghill)