Police spent the night questioning a 55-year-old man who was arrested after explosives were found at a house in Mexborough.
Officers now believe the man may have been trying to make homemade fireworks at his address in Chestnut Grove, Mexborough.
Around 50 homes were evacuated as a result of the discovery yesterday morning with residents returning home about 7pm last night.
Supt Liz Watson said there was “nothing linking it to terrorism” and it is thought the suspect may have been making fireworks.
She added: “We think it’s a case of someone that’s been making fireworks but until we conduct the investigation and assess exactly what the materials are we’re not clear on his exact intent.”
The army bomb disposal unit and firefighters are also at the scene.
A police spokeswoman said the man had been arrested on suspicion of possessing explosives for an unlawful purpose.
Doncaster Council has set up a rest centre at Mexborough Day Centre for residents until they are able to return to their homes.
Other residents sheltered at The Highwoods pub.