A drug-addicted youth allegedly stabbed his mother to death after she refused to give him money for drugs at Dilpur village in Daganbhuiyan Upazila of Feni district on Sunday night.

The accused, Mosharraf Hossain Rafi, 21,  also attacked his father and sister, leaving them injured.

The deceased was identified as Lucky Begum, 45 and the injured are her husband Mohammad Mostafa, 55, and their daughter Mosammad Mithila Mostafa, 18, residents of Dilpur village.

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Witnesses and police said Rafi returned home on Sunday night and demanded money from his mother to buy drugs.

When she refused, he attacked her with a sharp weapon, leaving her critically injured.

As his sister Mithila and father Mostafa tried to save her, Rafi stabbed them as well.

The injured were taken to Feni 250-bed General Hospital, where doctors declared Lucky Begum dead.

Mostafa, a Saudi expatriate, and Mithila, a second-year HSC student of Rajapur Alim Madrasa, are undergoing treatment at Chittagong Medical College Hospital in critical condition.

Local caught Rafi and handed him over to law enforcers.

Shahriar Kabir, a doctor at the emergency department of Feni 250-bed General Hospital, said Lucky Begum had died before being brought to the hospital.

Muhammad Faizul Azim Noman, Officer-in-Charge (OC) of Daganbhuiyan Police Station, said Rafi was detained from the scene.

During initial interrogation, he told police that he had ordered two knives online. Police seized the knives used in the killing.

Additional Superintendent of Police Saiful Islam said the body was sent to the Feni General Hospital morgue for autopsy and legal proceedings are underway.