Firefighters spray water as they work to extinguish a fire at the bell tower of Novodevichy monastery, a UNESCO World Heritage site, in Moscow March 15, 2015. [Photo/Agencies]

MOSCOW - The bell tower of Novodevichy monastery in Moscow, one of the city's landmarks, caught on fire on Sunday night, local media reported.

Firefighters were working at the site. No injuries were reported so far.

The fire was reported at 22:41 local time, and it was concentrated on scaffolds surrounding the tower, which is under renovation, according to RT news website. The surface area of the fire is about 100 square meters.

The cause of the fire is currently unknown.

The monastery is one of the main tourist attractions in Moscow and was placed on the UNESCO World Heritage List in 2004.