(CNN) -- A fire at a karaoke bar and discotheque in Medan, in Indonesia's North Sumatra province, killed at least 20 people Friday night, according to a hospital.
At least two people survived, according to Aida Sofiati of the Pringadi Hospital in Medan.
Sofiati said 20 people were killed.
Mohammad Zein, a fire official, said the blaze started around 10 p.m., but firefighters were able to extinguish it within a half-hour.
He said the cause of the fire was not known.
