Awami Olama League President Ilias Hossain Bin Helali has been stabbed in front of Baitul Mukarram mosque in Dhaka.
Paltan police station OC Golam Morshed said the Olama League chief was rushed to Dhaka Medical College Hospital.
Olama League Joint General Secretary Aktar Hossain said a youth, aged about 17 years, attacked Helali with sharp weapons when he came out from Baitul Mukarram Mosque after Friday's Jummah prayers.
Police arrested the attacker, Mujahidul Islam, from the spot. An additional commissioner of police said the attacker was previously involved with Shibir's politics, now he is a supporter of Ansarullah Banga Team.
The detainee was handed over to DB.