(CNN) Two London police officers suffered minor injuries to their arms while detaining a man on The Mall outside Buckingham Palace, Metropolitan Police said.

Authorities said the man is being held on suspicion of assault of police and grievous bodily harm.

In a statement, police said the man, thought to be in his 20s, stopped his car near a police vehicle outside the Mall roundabout near Spur Road around 8:35 p.m. (3:35 p.m. ET) Friday,

Officers spotted a large knife in his vehicle and went to arrest him, police said. During the arrest, two male police officers suffered minor injuries to their arms.

The officers were treated at the scene. No one else was reported injured, police said.

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