Attack occurred April 26 near Firmowa street in Opole. Victim riding scooter suddenly attacked by unknown dark-skinned man. Scuffle ensued with knife used by attacker. Victim sustained superficial non-life-threatening injuries. Suspect fled scene. Police investigating to catch man. Suspect aged 25-30, 176 cm tall, medium build, dark complexion. Police released identikit portrait. Public urged to identify suspect or provide info to Opole police.