New Delhi, March 26 -- The White House said Wednesday it remains engaged in negotiations with Iran, despite reports that Tehran has rejected a US proposal to end the ongoing conflict.

"Talks continue. They are productive," Press Secretary Karoline Leavitt said during a briefing, pushing back against claims that discussions had stalled.

The White House struck a stark tone, warning of escalating military action if diplomacy fails.

"If Iran fails to accept the reality of the current moment. President Trump will ensure they are hit harder than they have ever been hit before," Leavitt said.

"President Trump does not bluff and he is prepared to unleash hell. Iran should not miscalculate again."

Iranian state media, citing an unidentified o...