Five people were killed in a mass shooting at a food market in Bangkok on Monday.

The suspect in the attack at Or Tor Kor Market died after taking his own life, police in Thailand’s capital confirmed.

Four of those killed were security guards and the fifth victim worked at the market. Two other market sellers were injured, police said.

Police Lieutenant Siam Boonsom told local media that the gunman was Thai and he had disputes with the market’s security guards before.