A police team from Metropolitan Police Crime Division nabbed Khadka Bahadur KC, 23, of Rukum and Naresh Thakuri, 30, of Dhading from Bhrikutimandap of the capital on Monday.
The duo has been sent to Metropolitan Police Circle, Kirtipur for further action, police said in a statement.
The bus, Na 1 Ka, 1023, was set on fire after pouring petrol in front of Laboratory School while it was heading to pick up the students of the school.
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