The ill-fated boat's skipper, Piterson Plaituka (30) and three crew members survived and were currently being grilled by police, Adjunct Senior Commissioner Patar Silalahi, Alor Police chief, said.
"We are still questioning the four crew members to find out the cause of MV Nusa Kendari 02 sinking on Saturday at 5 a.m. local time," Silalahi said here on Sunday.
MV Nusa Kenari 02 with tens of passengers on board, sank in Tanjung Margeta waters, Alor District, on the way to Mademang Village, Purnama Sub-district, from Kalabahi, the capital of Alor District on early Saturday.
The boat carried cargoes and 52 people aboard. Following the accident, 45 people were rescued, four slightly injured, two dead and five others comprising two adults and three children missing.