WASHINGTON — Iran conducted its first missile test since President Trump took office, American and Israeli officials said Monday, posing an early test of whether the Trump administration will make good on its promises to strictly enforce all aspects of the Iranian nuclear deal and a side agreement on missile testing.

The Iranian missile traveled about 600 miles, but its re-entry vehicle reportedly exploded before the flight was complete. It is unclear whether that was accidental or a deliberate detonation.

Israel’s United Nations ambassador, Danny Danon, accused Iran of violating a Security Council resolution passed in 2015, shortly after the nuclear accord was reached in Vienna.

While the agreement itself dealt only with Iran’s nuclear program, then-Secretary of State John Kerry negotiated for days with the Iranians about a revised Security Council resolution on missiles. That last concession by the United States, China, Russia, Germany and France sealed the entire diplomatic package.