A US-based techie, who returned to the city on Saturday, killed himself on Sunday by consuming poison inside a cab on his way to his sister’s house in Kukatpally. Police suspect marital discord to be behind his suicide.

Police said, E Anil Kumar, 30, stayed in a hotel after he returned from the US. He hired a cab to meet his sister when she called him home but consumed poison on the way. “By the time the cab reached Eenadu colony, Anil had died... He has left a suicide note in which he stated frustration as the reason for ending his life,’’ said subinspector Krishna of Kukatpally Police Station.