Donald Trump has been accused of remarking on the breasts of a star of the American version of Dragons' Den, in the latest of a string of sexual misconduct allegations made against the Republican presidential candidate.

Barbara Corcoran, a real estate expert, claimed in an interview with CNN that Mr Trump compared her breast size to his then-pregnant wife during a business meeting. She did not say when the alleged comments were made.

"I was pregnant and he compared my breast size to his wife by putting his hands in the air," Ms Corcoran told CNN's Erin Burnett. "I was in a business meeting. I was shocked."

Shark Tank is a franchise of Dragons' Den, a reality show in which contestants pitch to a panel of investors, or "sharks", including Ms Corcoran.