Police in Uganda say a school dormitory caught fire overnight, killing 19 young students and two adults inside.

Authorities say the children were between the ages of 7 and 10. School worker James Kiiza says the doors to the dormitory were locked from the outside.

Uganda police spokeswoman Judith Nabakooba says authorities are investigating the cause of the fire.

The school is more than seven miles from the capital, Kampala.