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Police were called after a fracas broke out in Gravesend town centre.
A Kent Police spokesman confirmed officers were in the High Street, near the junction with New Road, after a disturbance near discount UK at lunchtime yesterday.
A witness said they had seen a young man, wearing glasses, yelling at a group of about four other people.
He said: "He was screaming at them. He looked as if he had injuries to his arms. He was very, very angry."
A Police Community Support Officer was trying to separate them, and security staff from other stores were quick to join her. Two passing soldiers also offered help.
The eye witness said: "She managed to defuse the situation and held the group back, but the man just kept shouting."
Subway manager Anita Saleem said the man came into sandwich shop. She said: "He came in and lost control because of what had happened outside.
"He knocked over a table but didn't threaten any staff or customers.
"A friend of his was in here eating and he came in looking for her. Staff are all OK, just a bit shocked."