The captain and two crew of an overloaded Indonesian ferry that sank into the depths of a volcanic lake have been detained for questioning over the deadly disaster, police said. The trio were among just 18 people rescued after the vessel capsized and sank at Lake Toba, a picturesque tourist destination in Sumatra.

Three passengers have been confirmed dead, but official estimates listed 193 others — including children — as missing. That has raised fears the sinking could be one of Indonesia's deadliest maritime disasters. The traditional wooden boat could have been carrying five times the number of passengers it was built to hold, along with dozens of motorcycles, officials said.