U.S. sees more indications of Russia, Iran defense cooperation -White House

WASHINGTON, May 15 (Reuters) - The United States is seeing more indications that Russia and Iran are expanding an unprecedented defense partnership that will help Moscow prolong its war in Ukraine as well as pose a threat to Iran's neighbors, the White House said on Monday.

As part of the cooperation, Iran is providing Russia with one-way attack drones, including more than 400 since august, national security adviser John Kirby said at a news briefing.

Reporting by Steve Holland and Doina Chiacu;