JAKARTA, Jan. 15 (Xinhua) -- Part of the first floor of Indonesia's stock exchange building collapsed on Monday, injuring several people.

Local TV reports footages showed debris and mangled metals around a coffee shop.

Police said further investigation was being carried out at present related to the collapse.

Dozens of those injured, mostly women, have been sent to nearest hospitals. Many ambulances come and go evacuating those injured in various degree of severity.

The collapse took place shortly after the conclusion of morning stock trading at 12:10 p.m. local time.

A witness said the collapsed floor was in the tower 2. The collapse happened during lunch break time where many people were below the collapsed floor.

"It was very crowded here as there was a student visit program going on when the collapse took place," the witness said.