THE HAGUE—The International Criminal Court on Sunday said it had taken into custody a former Central African Republic commander of the “Seleka” faction suspected of war crimes and crimes against humanity. In a statement, the court said Mahamat Said Abdel Kain had surrendered to the court on Sunday and had been arrested under a warrant issued under seal on Jan. 7, 2019, relating to alleged crimes from 2013. A date for his initial appearance in The Hague has not yet been set. The arrest comes against the backdrop of a state of emergency in the Central African Republic, with fighting between the country’s army, backed by U.N., Russian, and Rwandan troops, and rebels seeking to overturn a Dec. 27 vote in which President Faustin-Archange Touadera was declared the winner. A judge for the court said there was reasonable grounds to believe that Said, 50, was responsible for crimes including torture, …