21-year-old Abrar Fahad was on Saturday allegedly killed by activists of Bangladesh Chhatra League.

The murder of a student of Bangladesh University of Engineering Technology (BUET) has sparked massive outrage in Bangladesh.

Thousands of students from prestigious BUET staged massive protests in capital city Dhaka and Rajshahi city on Monday against the killing of the undergraduate student.

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21-year-old Abrar Fahad was on Saturday allegedly killed by activists of Bangladesh Chhatra League (BCL), the student wing of the ruling Awami League party.

He was allegedly killed over his Facebook post critical of Bangladeshโ€™s recent water-sharing agreement with India, Aljazeera reported.

In a social media post, Fahad asked โ€œwhy should we give 1.5 lakh cumec of water [of Feni river]โ€ to India without โ€œany return.โ€

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On Saturday, Dhaka and New Delhi signed several agreements, including allowing India to withdraw 1.82 cusec (185,532 litres per hour) of water from Feni river during Prime Minister Sheikh Hasinaโ€˜s visit to India.

At least nine BUET students, some of them belonging to the ruling party have been detained, in connection with the murder.

The main opposition BNP condemned the murder and said the ruling party members have โ€œstained their hands with bloodโ€.

โ€œIt seems to me that we are living in a death valley,โ€ BNP secretary general Mirza Fakhrul Islam Alamgir said in a statement.