Dhaka, June 6 -- National Citizen Party (NCP) Chief Coordinator Nasiruddin Patwary has warned of "punishment" after a party event in Narayanganj's Rupganj Upazila came under attack for a second time, which he blamed on BNP's student wing, Jatiotabadi Chhatra Dal.

The Eid reunion was organised on a local primary school ground in Daudpur Union on Saturday, with Patwary attending as a guest.

NCP leaders said the stage was attacked shortly before the programme began, leaving several party leaders and activists injured.

The party alleged the attack was carried out by a group led by Sultan Mahmud, a former convenor of the Upazila unit of Chhatra Dal. NCP leaders also claimed the same group had attacked the venue the previous night.

Mahmud c...