Did Karna attack the unarmed Abhimanyu?

Did Karna attack the unarmed Abhimanyu? During the battle at Kurukshetra, Abhimanyu was sent to penetrate the Chakra-Vyuha created by Drona and counter him. It was only his father Arjuna, Pradyumna and uncle Vasudev who had the skill and they were distracted by the Kurus elsewhere. Other warriors along with Bhima, Satyaki, Panchalas, Kekayas, the Matyas followed to protect him since he did not have the knowledge to exit the vyuha. Once inside the Chakravyuha, Arjun’s son fought bravely single handed. Other warriors out to aid him were not allowed to enter by king Jayadrath. Karna was revered by the Kauravs. He left no stone unturned to oppress his nephew. Abhimanyu too afflicted his uncle with sharp tufted arrows. “ He exhibited his supreme weapons and pierced Subhadra’s son with hundreds of arrows.” Arjun’s son inflicted him back with weapons sharpened on stone to sever bows of heroes. “ Vaikartana Karna used his arrows to swiftly slice down the bow of the light handed one “ and supreme shield while Drona severed the sword. Bhoja killed the horses and Kripa the charioteers. Karna along with Drona, Ashwathamma, Brihadbala, Kripa, Duryodhan, Kritavarma and Shakuni in unison showered arrows on the child warrior relentlessly while he fought single handedly. He died countering Dushassana’s son when stuck by his club on the head. picture from online source Abhimanyu Vadha Parva Bibek Debroy’s Mahabharat