South Shields MP Emma Lewell-Buck has condemned the "aggressive" actions of a man who left her office staff intimidated.
Police were called to her constituency office, in Westoe Road, after receiving reports of a man becoming aggressive towards staff.
It happened on Friday June 24 at 11am - the day after the EU Referendum took place.
Mrs Lewell-Buck was not at the office at the time, but said her staff reported that a man was shaking the door and banging on the glass.
She said: "I hope the police identify who the gentleman is as soon as possible and that a message is sent out that you can't act this way.
"You can't just turn up to an office or a public building and behave that way.
"I understand that people were agitated after the EU Referendum but acting in a threatening way isn't the way to get what you want."
A Northumbria Police spokesman said: "On Friday, June 24, at 11am a man visited a premises in Westoe Road and became aggressive causing staff to feel intimidated."
Officers have released a CCTV image of a man they would like to speak to who was in the area at the time and who may be able to help police with their inquiries.
Anyone who recognises the man pictured is asked to contact police on 101 quoting reference 366 240616 or Crimestoppers on 0800 555 111.