Bomb disposal experts have been called to deal with a suspicious package found in Three Bridges, Crawley.
A spokesman for Sussex Police said they were called after a small envelope arrived at an office in Stephenson Way at around 11.45am today (Wednesday February 19).
He added: “Local officers have arrived and are assessing the situation.
“Military Ordnance Disposal have also been asked to attend.
“The building has been evacuated for the time being purely as a precaution but it has not been necessary to carry out any further evacuations at present.”
Updates to follow.