Family members sit together as they wait for rescue teams searching for missing passengers at the Lake Toba ferry port in the province of North Sumatra on June 20, 2018, after a boat capsized on June 18. The death toll from an Indonesian ferry disaster could top 180, as authorities raised an estimate of the number of people missing two days after the wooden tourist boat sank in Lake Toba on the island of Sumatra. (Photo/Agencies)
Search and rescue personnel look for missing passengers from Monday's ferry accident at Lake Toba in Simalungun, North Sumatra, Indonesia June 20, 2018. The death toll from an Indonesian ferry disaster could top 180, as authorities raised an estimate of the number of people missing two days after the wooden tourist boat sank in Lake Toba on the island of Sumatra. (Photo/Agencies)
Rescue team members prepare to search for missing passengers at the Lake Toba ferry port in the province of North Sumatra on June 20, 2018, after a boat capsized on June 18. The death toll from an Indonesian ferry disaster could top 180, as authorities raised an estimate of the number of people missing two days after the wooden tourist boat sank in Lake Toba on the island of Sumatra. (Photo/Agencies)
Family members sit together as they wait for rescue teams searching for missing passengers at the Lake Toba ferry port in the province of North Sumatra on June 20, 2018, after a boat capsized on June 18. The death toll from an Indonesian ferry disaster could top 180, as authorities raised an estimate of the number of people missing two days after the wooden tourist boat sank in Lake Toba on the island of Sumatra. (Photo/Agencies)