Andhra Pradesh police arrested a 38-yr old man who allegedly killed 10 people including three women across three districts in a span of 20 months by poisoning them with cyanide. West Godavari superintendent of police Navdeep Singh Grewal said Vellanki Simhadri of Venkatapuram village had committed these serial murders in the districts of Krishna, East Godavari and West Godavari in a pre-planned manner between February 2018 to October 2019.