DHAKA, Dec. 25 (Xinhua) -- Three members of the border guarding force of India have been detained by the Bangladeshi border guards after they trespassed into Bangladesh through a bordering area in the country's Rajshahi district, 256 km west of capital Dhaka.

A Border Guard Bangladesh (BGB) official who did not like to be named told Xinhua that the Indian Border Security Force (BSF) members, identified as Assistant Sub Inspector Harnam Shing, Constables Rakesh Kumar and Santosh Kumar, went about 1 km into Bangladeshi territory Monday morning.

He said what they explained to the BGB members primarily is that while chasing some cattle smugglers amid thick fog they lost their ways and mistakenly entered Bangladeshi territory.

Authorities are clarifying the incident. No further details were immediately available.

The BGB official said the BSF personnel would be handed over to the border guarding force of India.