A police constable was injured after a crude bomb, locally known as a cocktail, was allegedly thrown at a police patrol vehicle during a motorcycle procession by the banned Chhatra League in the Kurmitola area of Dhaka on Thursday morning.The incident took place around 7:30am in front of Kurmitola General Hospital on the Airport Road. Police have detained three people in connection with the attack.Mohammad Gias Uddin, officer-in-charge of Cantonment Police Station, confirmed the incident.He said a cocktail was thrown at a police patrol vehicle in front of the Army Golf Club from a motorcycle procession organised by the banned Awami League. Constable Md Enamul, who was driving the vehicle, sustained injuries in the attack.The OC said police had detained three people and were verifying their identities and involvement. The injured constable is receiving treatment at a hospital.Police are also examining CCTV footage to identify and arrest the motorcycle riders involved in the attack, he added.According to several police sources, a convoy of around 70 to 80 motorcycles was travelling from the Banani area towards Kuril Bishwa Road, chanting “Joy Bangla”.When the procession reached the area in front of Kurmitola General Hospital, a cocktail was allegedly hurled at the Cantonment Police Station's patrol vehicle, identified as Golf Club-83.The explosion caused minor injuries to Constable Enamul's left eye. He was initially taken to the emergency department of Kurmitola General Hospital and later transferred, on medical advice, to the National Institute of Ophthalmology and Hospital in Agargaon. He is currently receiving treatment there.Meanwhile, a video circulated on social media shows the procession being organised at the direction of Riaz Mahmud, president of Dhaka Metropolitan North Chhatra League.The participants were seen chanting various slogans before leaving the scene quickly amid the law enforcement agencies' response.