This security camera video shows how the hospital is burned in just three minutes.
14 People have died and 12 have been saved.
The COVID-19 modular unit was erected last year in a hospital for around 50,000 people in the city.
Tetovo deputy fire chief Saso Trajcevski told the local television, “The fire was large since the hospital is modular, there was plastic,”
“As we put out the flames, we have taken away victims.”
In Skopje, the capital, several wounded people were rushed to hospitals.
There are around two million people living in north Macedonia, with its health services decreased.
Since mid-August, coronavirus instances have been growing and the government has been pushing for tighter social measures such as cafe health cards and eateries.