Obama at the Bataclan memorial paying his respects after arriving in town for the COP21 climate change conference.

President Barack Obama laid a rose at a memorial on Monday night for the victims of the Paris attacks shortly after arriving in the city, visiting the Bataclan concert hall, one of the locations of the onslaught that left 130 people dead on Nov. 13.

Obama, who is in town for international talks to curb climate change, was joined at the site by French President Francois Hollande not long after Air Force One touched down around midnight local time.

The surprise nighttime visit to the memorial did not appear on Obama’s public schedule. He has made a concerted effort to show U.S. solidarity with France after the attacks.

He and Hollande agreed during a meeting in Washington last week to ramp up military operations against ISIS in Syria and Iraq and coordinate intelligence on domestic threats.

Obama is scheduled to stay in Paris until Tuesday for talks to hash out an agreement with world leaders to fight global warming.

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