Hamilton doubled their lead soon after when Keatings grabbed his second as he turned in Jon McShane's cross.
Dumbarton hit back midway through the second half when Scott Agnew scored from the spot after referee Kevin Clancy spotted some shirt-pulling.
The comeback was short-lived though when Gillespie was allowed too much time to stroke home before Tony Andreu secured all three points for the Accies with an emphatic finish from the edge of the box.
- Sports & Recreation
- Kevin Cuthbert