Police said Chimmanlal (50) and his wife Mohandei (45) were killed in the mishap last night.
As the news spread, a large number of villagers gathered at the spot.
In the meantime, a rumour spread that policemen had allowed the tanker driver to escape. The villagers then held a demonstration and blocked the Bareilly-Delhi Highway.
When station officer Anil Kumar Sirohi attempted to pacify the agitating villagers, they clashed with him and and one of them hit with a lathi.
Later, police resorted to lathicharge to clear the blockade.