Sweyn Road in Cliftonville has been closed off from Eastern Esplanade up to Northdown Road by Kent Police.
Police vehicles, both marked and unmarked, and two fire engines are currently at the scene of an incident understood to be related to an eviction.
Kent Fire & Rescue Service crews are in attendance at a block of flats in the road to assist police officers. Some residents have been evacuated from their homes.
A Kent Police spokesperson said: “Kent Police is attending an address in Sweyn Road following threats made by a person inside the property.
“Officers along with other emergency services have been in attendance since around 9am.
“A cordon has been set up as a precaution while officers deal with the incident.”
A KFRS spokesperson said: “Kent Fire and Rescue Service has been called to assist Kent Police at a block of flats in Sweyn Road. Two fire engines have been sent to the scene.”