Swiss investigators are convinced that a significant number of the 48 cult members found dead in two villages did not commit suicide but were murdered, according to TIME Switzerland reporter Robert Kroon. Reason: In one location police found several suitcases all packed, as if the members had "traveled from elsewhere for a meeting of the sect," says Kroon. "Police sources tell me they think it's peculiar that people would have their bags packed before they get ready to die." Investigators also tell Kroon that they think the deaths are related to disagreements within the cult. Another indication of murder: Many of the bodies have injection marks, Kroon says, suggesting they may have been heavily sedated or poisoned before they were shot. At least some probably did commit suicide, however: police have found a few goodbye letters written to family members.