North Korean leader Kim Jong Un vowed to accelerate the development of nuclear weapons and threatened to use them if provoked in a speech he delivered at a military parade that featured powerful missiles capable of targeting the country’s rivals, state media reported Tuesday.

Kim’s remarks suggest he will continue provocative weapons tests in a pressure campaign aimed at wresting concessions from the United States and its allies. The parade Monday night marked the 90th anniversary of North Korea’s army — the backbone of the Kim family’s authoritarian rule — and was held as the country’s economy is battered by pandemic-related difficulties, punishing U.S.-led sanctions and its own mismanagement.

State media photos showed Kim, dressed in a white military ceremonial coat, smiling and waving from a balcony along with his wife Ri Sol Ju and top deputies.