The shooting, behind Batu Tamong police station in tambon Tham Thalu, occurred at 7:45pm on Tuesday (Oct 25).
Guests at the party, mostly policemen and their families, hid under tables or fled in panic.
Capt Jariyapat Sukchum, a deputy chief investigator at Than Tho station, said the dead victims were two policemen.
Police said Hassapol Soprakhon, attached to Batu Tamong station, and one of the guests, fled after firing an M-16 rifle indiscriminately at party-goers.
Nine police were wounded, along with five civilians, four of them women.
The injured were taken to Than Tho station. Most of the victims were police attached to Batu Tamong station in Bannang Sata district.
The slain officers were named as Capt Natthawat Churat, 39, deputy crime suppression chief at Batu Tamong, and Snr Sgt Maj Sayant Phettem, 44.
Police cordoned off the crime scene in front of the police living quarters in the compound of Batu Pamong station. Forensic investigators were examining the area.
Maj Gen Ronnasilp Phusara, acting commander of Southern Border Provinces Police Operation Centre, said Cpl Hassapol is from Buri Ram province and his wife still lives in the northeastern province.
Maj Gen Ronnasilp said Cpl Hassapol worked hard and had not returned home for a long period when he found out his wife had allegedly been associated with another man.
Cpl Hassapol revealed his family problems to his police friends, Maj Gen Ronnasilp said.
Maj Gen Ronnasilp said that about an hour before the shooting, the suspect went to his friend’s house and found him having dinner with his wife. He said: “I hope you are happy like this, it is only me that is stressed.”
Maj Gen Ronnasilp admitted that several police officers at the centre were stressed, particularly those who left their home town in another region.
Read original story here.