About 500 families spent the night in the cold yesterday after a fire razed a section of Mathare slum.
Area police boss Benjamin Kisela said 25 people sustained minor injuries were taken to Viva Afya Medical Centre.
He said the cause of the 2pm fire is not known.
Kisela said rowdy youth interfered with the rescue operations.
“Most of the property was razed because the youth hurled stones at police and the fire fighters from the Nairobi City Council and the National Youth Service, forcing them to abort the operation,” he said.
Kisela said the youth may have had the intention of looting property.
Fire fighters later managed to put it out.
