A truck packed with illegal immigrants from Afghanistan and Myanmar overturned in western Turkey on Sunday, killing 18 people and injuring 23, authorities said. The accident occurred near the town of Malkara, about 100 kilometers (60 miles) west of Istanbul, when the driver apparently lost control, authorities said. No other vehicles were involved, authorities said. The back of the truck had hidden compartments for smuggling people, the state-run news agency said, reporting from the scene.