Six children's books written decades ago by Dr Seuss were pulled from publication because they contain racist and insensitive imagery, the company formed to preserve the deceased author's legacy said on Tuesday.

The books - And to Think That I Saw It on Mulberry Street, If I Ran the Zoo, McElligot's Pool, On Beyond Zebra!, Scrambled Eggs Super!, and The Cat's Quizzer are among more than 60 classics written by Dr Seuss, the pen name of the American writer and illustrator Theodor Geisel, who died in 1991.

"These books portray people in ways that are...