Bangladesh has formally protested to India over the killing of a teenage girl found shot dead near the border, according to the foreign ministry. Describing the incident as a 'ruthless act', Bangladesh has 'strongly protested and condemned such ruthless acts' in a protest note delivered to the Indian High Commission in Dhaka. The note urged India to 'stop repetition of such heinous acts'. The protest follows the return of the 13-year-old girl's body by Indian officers, although Indian officials had previously stated her age as 14. A top Indian official had earlier pledged to halt 'infiltration' across the border, with Indian security forces having detained or repatriated numerous Bangladeshis accused of attempting to cross since the ousting of former leader Sheikh Hasina. Indian border officers discovered the girl with a bullet wound during a routine patrol in Tripura state on Sunday, but provided no further details. Bangladesh has accused India's border police of the girl's death. Meanwhile, Himanta Biswa Sarma, chief minister of India's Assam state, announced that police had successfully 'pushed back' five more Bangladeshis attempting to cross the border. Sarma reiterated the commitment to an 'infiltration-free Assam', praising the police for maintaining 'constant vigil along the Indo-Bangladesh border'. Bangladesh is almost entirely surrounded by India, with their shared border extending over 4,000 kilometers. Last month, security forces from both countries experienced a tense standoff over the construction of a fence intended to prevent cattle from straying across the border.