Senior Superintendent of Police Nitin Tiwari (SSP) said Ashraf (45) and his younger brother Afzal were residents Bindu Chowk in Khan Alampur under Janakpuri police station.
The wives of the duo had a tiff over some minor issue yesterday. Enraged over the incident, Ashraf allegedly killed Afzal by slitting his throat while the latter was asleep last night, Tiwari said.
Their youngest brother lodged an FIR in this connection against Ashraf, his wife Saida and son Muzizmal, the SSP said.
It appears that after murdering his brother, Ashraf allegedly committed suicide by jumping in front of a train, Tiwary said.
Both the bodies have been sent for post-mortem and police were searching for the accused, he added.
