A 38-year-old man has been arrested in connection with the murder of his grandmother, who was found strangled to death at her residence in suburban Andheri seven years ago, police said on Friday.

The accused Pradeep Tukaram Sonawane, who had remained untraceable since his 75-year-old grandmother's death in 2014, was nabbed from Kalyan in neighbouring Thane district, an official said.