A pregnant woman was strangulated to death and her body dumped into Ganga canal allegedly by her husband and in-laws when she refused to fulfil their demands for dowry here, police said on Saturday. SHO Rajender Giri said that according to a complaint lodged by the victim's father, Neha (30) got married to Kamal four years ago, but he and his family used to harass her for dowry. He alleged that they had killed his daughter over the same issue.