Former Vice President Joe Biden warned that President Donald Trump “just tossed a stick of dynamite into a tinderbox” by ordering the killing of a powerful Iranian general in Baghdad, Bloomberg reported.

“No American will mourn Qassem Soleimani’s passing. He deserved to be brought to justice for his crimes against American troops and thousands of innocents throughout the region,” Biden said in a statement. But he added that Trump “owes the American people an explanation of the strategy and plan to keep safe our troops and embassy personnel, our people and our interests, both here at home and abroad, and our partners throughout the region and beyond.”

“I’m not privy to the intelligence and much remains unknown, but Iran will surely respond. We could be on the brink of a major conflict across the Middle East.”