Pol Lt Chukri Paduka, the police duty officer, said it was the second attack on the shophouse owned by Yuthapol Pathomsathit, 50. The previous attack was on Jan 27.
A team of forensic police sent to examikne the Paisal Hardware shop in village 3 of tambon Khok Mo reported two glass doors had been shattered by shotgun pellets.
Neighbours told police they heard four or five loud sounds, like gunshots, late Sunday night but did not pay much attention. They frequently hear similar loud noises because their homes are near the Phetkasem highway.
The police were also informed by Mr Yuthapol's former wife, Orawan Chalitpongsathit, 54, that shots were also fired at her minimart in tambon Don Tako last night.
Police found six bullet holes in the wall of the shop.
Mrs Orawan said she believed the shooting was intended to intimidate her former husband, even though they had been divorced for four years.