A person of interest is in custody after a massive structure fire broke out Monday in the 800 block of E. Huntington Drive in Monrovia.

The Monrovia Fire Department, with assistance from the Los Angeles County Fire Department, responded to the blaze at around 5 p.m.

Footage from Sky 5 showed heavy flames and smoke coming from the building, before firefighters were able to knock the blaze down.

Witnesses reported seeing a person set the fire, and police took the man into custody after a short foot pursuit.

According to Sgt. Harvey with the Monrovia Police Department, the man has not yet been charged with a crime.