PORT-AU-PRINCE, Haiti—Police say they have arrested four more suspects in the assassination of Haitian President Jovenel Moïse, bringing the total to six detained and seven killed. National Police Director Léon Charles told Radio Metropole Thursday that police are still looking for more of those responsible for the early Wednesday’s raid in which the president was shot to death and his wife, Martine, critically wounded. Officials haven’t given any details about the suspects, including their nationalities, nor did they suggest a motive for the attack, which they said was carried out by “a highly trained and heavily armed group,” whose members spoke Spanish or English. At least two suspects in the killing of Moïse were found and roughed up by civilians in the capital of Port-au-Prince and were then turned over to police. Journalists saw scores of people gather around the men on Thursday, grabbing the suspects by their shirts and …