LUCKNOW, Jan. 26 -- The key suspect in the murder of five members of a family -- a couple and their three daughters aged between 1 and 8 years -- in Meerut earlier this month was gunned down in retaliatory firing during an encounter with the police in Meerut on Saturday early morning, confirmed Uttar Pradesh director general of police (DGP) Prashant Kumar.

He said the key suspect was tracked after a chase of nearly 15 days.

The suspect, identified as Naeem alias Zameel alias Guddu, was also wanted in connection with a double murder committed in Mumbai in 2006 and a murder in Delhi in the year 2000.

He said a reward of Rs.50,000 was declared on the suspect by Meerut range deputy inspector general (DIG) Kalanidhi Naithani after his invol...