Iran ratcheted up its rhetoric against the U.S. on Sunday, a day after it said it had reasserted control of the Strait of Hormuz. President Donald Trump confirmed peace talks with Iran are continuing, while warning Tehran not to try to use blackmail.

Iran’s parliament speaker and top negotiator, Mohammad Bagher Ghalibaf, said talks to end the war with the U.S. and Israel are continuing but that his country stands ready to resume the conflict and warned the U.S. against using a naval blockade against its ships in the strait.

“It is not the case that we think just because we are negotiating, the armed forces are not ready,” Mohammad Bagher Ghalibaf said in televised remarks late Saturday according to a report on Iranian state media. “Rather, just as the people are in the streets, our armed forces are also ready.”

Ghalibaf also reiterated Iran’s intentions to restrict traffic through the strait, a key energy chokepoint.

“It is impossible for others to pass through the Strait of Hormuz but not us. If the U.S. does not abandon the blockade, traffic in the Strait of Hormuz will certainly be restricted,” he said.