By John Irish

PARIS (Reuters) - France and the United States will work harder to prevent a broader escalation in the Middle East with a key priority to calm the situation between Israel and Hezbollah, President Emmanuel Macron said on Saturday.

"We are redoubling efforts together to avoid a regional explosion, particularly in Lebanon," Macron said in a joint statement with Joe Biden during the U.S. President's state visit to France.

Macron added that the sides were working on "advancing parameters" to reduce tensions and end an institutional vacuum in Lebanon.

The United States has also worked on the issue, but diplomats have said there have been problems in coordinating efforts.

Macron said the two countries had developed "a close coordination" in the discussions "with Israel on one side and with Lebanon and all the parties involved on the other side".

Biden made no mention of Lebanon in the short statement and also did not mention Iran, which Macron said was adopting a strategy of escalation in the region, citing Tehran's attack on Israel and the development of its nuclear programme.

Despite U.S. reservations, France, Britain and Germany last week put forward a resolution against Iran that was passed over its nuclear programme at the U.N. nuclear watchdog's 35-nation Board of Governors.

While eventually backing the resolution, Washington had shown misgivings beforehand with diplomats saying the U.S. feared it could provoke Iran, something it wants to avoid before November's presidential election.

Fresh from commemorating the 80th anniversary of D-Day, Biden's state visit to France is marked by pomp as well as talks on trade, Israel and Ukraine.

(Reporting by John Irish, editing by Gus Trompiz and Clelia Oziel)