SOUSSE, Tunisia (AP) — Investigators are searching for one or more accomplices in an attack on a luxury hotel in a Tunisian beach resort that killed at least 38 people, some of them sunbathers on the beach, an official said Sunday. A security official close to the investigation confirmed news reports indicating that a swimmer had found the attacker's cellphone in the Mediterranean. The attacker methodically moved from the beach to the hotel's swimming pool, reception and other areas in a massacre that stands as Tunisia's worst terror attack.