Xavier Jugelé, 37, an openly gay Paris police officer fell victim to terrorism the terror attack at the Champs Elysees on Thursday evening.

Jugelé was a proud defender of gay rights, joining protests against Russia’s ban on “homosexual propaganda” before the 2014 Olympics. He once went to Greece to help police officers deal with migrants who had crossed the Aegean Sea and were seeking shelter in the European Union. He was among the officers who responded to a terrorist attack at the Bataclan in November 2015, and was in the crowd when Sting helped reopen the concert hall a year later.

“He was a simple man who loved his job, and he was really committed to the L.G.B.T. cause,” said Mikaël Bucheron, president of Flag, a French association for lesbian, gay, bisexual and transgender police officers. “He joined the association a few years ago, and he protested with us when there was the homosexual propaganda ban at the Sochi Olympic Games,” Mr. Bucheron said.

President François Hollande of France, speaking from the Élysée Palace on Thursday evening, said that an official tribute would be paid to Officer Jugelé in the coming days.

Jugelé was in a police vehicle on the heavily guarded Champs-Élysées, Paris’s most famous boulevard, when a gunman opened fire, killing him and wounding two other officers, along with a bystander.