NAIROBI, Kenya — A man suspected in the killing of two United Nations experts in the Democratic Republic of Congo was arrested early Saturday, according to Congolese authorities.

The man, Constantin Tshidime Bulabula, will be brought before a military court in Kananga, Brig. Gen. Marcellin Assoumani Issa Kumba of the Congolese armed forces said.

Mr. Bulabula had been sought since he disappeared from his home in October.

The experts, Michael Sharp, 34, an American, and Zaida Catalán, 36, a Swede, were investigating crimes associated with a rebellion in central Kasai Province when they were abducted along with four Congolese colleagues in March 2017.

The bodies of Mr. Sharp and Ms. Catalán were found two weeks later, about 75 miles south of Kananga. The whereabouts of their colleagues are unknown.