A man has been arrested for his alleged involvement in the murder of a security guard at Machindrabahal of Kathmandu on Sunday night.

Rajan Thapa Chhetri of Thaha Municipality in Makwanpur district was arrested on the charge of killing Tul Bahadur Tamang, 54, of Mawapauwa-2, Dolakha district.

Both of them were working as security guard at the East West Securities, said the Metropolitan Police Crime Division (MPCD), Hanumandhoka.

Tamang, who sustained critical head injuries after being attacked with  bricks, was rushed to the Trauma Centre but died during the course of treatment, police said.

A preliminary investigation suggests Chhetri killed Tamang by attacking with bricks to take the revenge. It has been learnt that the duo used to fight often in the past over minor disputes.