ISLAMABAD (Reuters) - Accusations in a secret U.S. military report that Pakistan backs the Afghan Taliban are "frivolous," said a senior Pakistani foreign ministry official on Wednesday.

"We are committed to non-interference in Afghanistan," the official told Reuters, responding to the document which Britain's Times of London newspaper reported on.

(Reporting by Qasim Nauman; Writing by Michael Georgy; Editing by Sanjeev Miglani)