Dhaka, May 17 -- A woman has allegedly been killed in an attack by BNP and Chhatra Dal leaders and activists in Cox's Bazar's Ukhiya over a "ha-ha" reaction to a post on the social media site Facebook.

The incident took place in the Taipalong area of the Upazila's Rajapalong Union around 8pm on Saturday, said Ukhiya Police Station chief Mujibur Rahman.

The deceased, Saida Begum, was a local resident.

Locals said that graffiti stating "Joy Bangla, Joy Sheikh Hasina" ("Victory for Bangla, Victory for Sheikh Hasina) was written on the wall of the Taipalong Madrasa a few days ago. Local BNP leaders filed a complaint with the police station against some leaders and activists of the Awami League and the banned Chhatra League.

This sparked a...